Materiały źródłowe

• #1 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  Acute appendicitis is the leading cause of abdominal surgery in children and the most prevalent abdominal surgical emergency worldwide. In the United States alone, approximately 300,000 hospital visits are reported annually related to appendicitis. Acute appendicitis is characterized by inflammation of the vermiform appendix, and patients typically present emergently within 24 hours of the onset of symptoms. […] The significance of this condition in terms of both pediatric and general surgery underscores the need for accurate diagnosis, prompt intervention, and appropriate management. This activity reviews the clinical features, evaluation, and treatment of acute appendicitis and stresses the role of the interprofessional team in evaluating and treating patients with this condition. […] Appendicitis is characterized by inflammation of the vermiform appendix and typically presents acutely within 24 hours. However, the presenting symptoms may be more indolent and less severe in cases with perforation with a contained abscess. […] Understanding the clinical features and distinctive nature of appendicitis is vital in providing timely care and preventing complications associated with this common condition.

• #2 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Appendicitis is one of the most common causes of acute abdominal pain in adults and children, with a lifetime risk of 8.6% in males and 6.7% in females. […] Findings from the history, physical examination, and laboratory studies aid in the diagnosis of acute appendicitis. […] Right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the best signs for ruling in acute appendicitis in adults. […] Absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis in children. […] The Alvarado score, Pediatric Appendicitis Score, and Appendicitis Inflammatory Response score incorporate common clinical and laboratory findings to stratify patients as low, moderate, or high risk and can help in making a timely diagnosis.

• #3 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  Acute appendicitis is the most common reason for emergency abdominal surgery and must be distinguished from other causes of abdominal pain. Family physicians play a valuable role in the early diagnosis and management of this condition. However, the overall diagnostic accuracy achieved by traditional history, physical examination, and laboratory tests has been approximately 80 percent. […] If the diagnosis of acute appendicitis is clear from the history and physical examination, prompt surgical referral is warranted. In atypical cases, ultrasonography and computed tomography (CT) may help lower the rate of false-negative appendicitis diagnoses, reduce morbidity from perforation, and lower hospital expenses. […] The diagnosis of appendicitis traditionally has been based on clinical features found primarily in the patients history and physical examination.

• #4 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  Diagnostic accuracy achieved by history and physical examination has remained at about 80 percent in men and women (men are diagnosed accurately 78 to 92 percent of the time, and women 58 to 85 percent of the time). […] Recently, imaging techniques such as ultrasonography, computed tomography (CT), and magnetic resonance imaging (MRI) were evaluated as diagnostic modalities in acute appendicitis and were shown to improve diagnostic accuracy and patient outcomes. […] If the diagnosis of appendicitis is clear from the patients history and physical examination, no further testing is needed, and prompt surgical referral is warranted. […] When the diagnosis is not clear, management options for suspected appendicitis include observation in a hospital, diagnostic imaging to clarify the diagnosis, laparoscopy, and appendectomy. Imaging studies are cost effective if a definitive diagnosis can be made and observation in a hospital can be avoided.

• #5 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  The overall accuracy for diagnosing acute appendicitis is approximately 80%, which corresponds to a mean negative appendectomy rate of 20%. Diagnostic accuracy varies by sex, with a range of 78-92% in male patients and 58-85% in female patients. […] The classic history of anorexia and periumbilical pain followed by nausea, right lower quadrant (RLQ) pain, and vomiting occurs in only 50% of cases. Vomiting that precedes pain is suggestive of intestinal obstruction, and the diagnosis of appendicitis should be reconsidered. […] The differential diagnosis of appendicitis is often a clinical challenge because appendicitis can mimic several abdominal conditions. […] Appendicitis is misdiagnosed in 33% of nonpregnant women of childbearing age. The most frequent misdiagnoses are PID, followed by gastroenteritis and urinary tract infection.

• #6 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  To help diagnose appendicitis, a healthcare professional will likely take a history of symptoms and examine the abdomen. […] Tests used to diagnose appendicitis include: […] A healthcare professional may apply gentle pressure on the painful area. When the pressure is suddenly released, appendicitis pain will often feel worse. This is because of inflammation of the lining of the abdominal cavity, called the peritoneum. […] A care professional also may look for abdominal stiffness and a tendency to flex the abdominal muscles in response to pressure over the inflamed appendix. This is called guarding. […] A care professional also may use a lubricated, gloved finger to examine the lower rectum. This is called a digital rectal exam. People of childbearing age may be given a pelvic exam to check for other problems that could be causing the pain.

• #7 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Recommended first-line imaging consists of point-of-care or formal ultrasonography. […] Diagnosing acute appendicitis accurately and efficiently can reduce morbidity and mortality from perforation and other complications. […] The variable location of the appendix causes variations in the clinical presentation, making diagnosis challenging, especially in pregnant women. […] The signs and symptoms that best rule in acute appendicitis in adults are right lower quadrant pain, abdominal rigidity, and radiation of periumbilical pain to the right lower quadrant. […] In children, however, absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis. […] Several clinical decision rules that incorporate findings from the patient’s history, physical examination, and laboratory tests have been developed and validated in a range of populations.

• #8 Appendicitis Tests: MedlinePlus Medical TestLock

  https://medlineplus.gov/lab-tests/appendicitis-tests/

  Appendicitis tests help your health care provider make an accurate diagnosis quickly so you can get proper care. […] Appendicitis tests are used to confirm or rule out a problem with the appendix in people who have appendicitis symptoms. […] You may need testing if you have abdominal (belly) pain that usually: Starts near your belly button and moves lower and to your right; Hurts more when you move, take deep breaths, cough, or sneeze; Gets worse within hours. […] Before ordering appendicitis tests, your provider will ask questions about your symptoms and medical history. You’ll also have an exam. If your provider thinks you could have appendicitis, you may have one or more tests to help confirm or rule out the diagnosis. […] To confirm or rule out appendicitis, your provider will consider your symptoms, medical history, and the results of your exam and appendicitis tests.

• #9 Acute appendicitis – Symptoms, diagnosis and treatment | BMJ Best Practice

  https://bestpractice.bmj.com/topics/en-us/290

  Acute appendicitis typically presents as acute abdominal pain starting in the mid-abdomen and later localising to the right lower quadrant. […] Diagnosis is usually made clinically. If investigation is required, computed tomographic scan or ultrasonography may show inflammation or dilatation of the appendix outer diameter to more than 6 mm. […] Key diagnostic factors include abdominal pain, anorexia, nausea and vomiting, right lower quadrant tenderness, high or intermediate risk score, tense, rigid abdomen, hypotension and tachycardia, and palpable mass. […] 1st investigations to order include FBC, CRP, abdominal ultrasound, and contrast-enhanced abdominal CT. […] Emerging tests include neutrophil-to-lymphocyte ratio, serum sodium, Pentraxin-3, serum amyloid A, and platelet indices.

• #10 Acute Appendicitis – Clinical Features – Management – TeachMeSurgery

  https://teachmesurgery.com/general/large-bowel/appendicitis/

  The main symptom of appendicitis is abdominal pain. Classically, this will present with a dull peri-umbilical pain that is poorly localised (from visceral peritoneum inflammation), but later migrates to the right iliac fossa, becoming localised and sharp (from parietal peritoneum inflammation). However, patients can present in a variety of ways, especially in children. Other associated symptoms include vomiting (typically after the pain, not preceding it), anorexia, nausea, or diarrhoea. […] On examination, patients may demonstrate rebound tenderness and percussion tenderness over McBurneys point. This can progress to guarding, especially if the appendix is perforated. In severe cases, patients can show features of sepsis, including tachycardia, hypotension, and pyrexia. In cases of an appendiceal mass, a mass in the right lower abdomen may be palpable.

• #11 Clinical Approach in the Diagnosis of Acute Appendicitis | IntechOpen

  https://www.intechopen.com/chapters/61365

  Normally, appendicitis presents with highly characteristic sequence of symptoms and signs. Initially, appendicitis causes visceral pain poorly localized to the epigastrium or periumbilical region, presumably because of distension of the appendix. Anorexia, nausea, and vomiting soon follow as the pathology worsens. […] A careful family history should be obtained for every child in whom acute appendicitis is suspected. […] The patient usually has a low-grade fever (38C) with associated tachycardia and appears flushed and with a dry tongue and fetor oris. […] In an international systematical review of appendicitis scores, Ying-lie found that the most common features are elevated white blood count (WBC), right lower quadrant pain tenderness, combination of anorexia, nausea or vomiting, rebound tenderness, and migration of pain to the right lower quadrant.

• #12 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  To help diagnose appendicitis, a healthcare professional will likely take a history of symptoms and examine the abdomen. […] Tests used to diagnose appendicitis include: […] A healthcare professional may apply gentle pressure on the painful area. When the pressure is suddenly released, appendicitis pain will often feel worse. This is because of inflammation of the lining of the abdominal cavity, called the peritoneum. […] A care professional also may look for abdominal stiffness and a tendency to flex the abdominal muscles in response to pressure over the inflamed appendix. This is called guarding. […] A care professional also may use a lubricated, gloved finger to examine the lower rectum. This is called a digital rectal exam. People of childbearing age may be given a pelvic exam to check for other problems that could be causing the pain.

• #13 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  To help diagnose appendicitis, a healthcare professional will likely take a history of symptoms and examine the abdomen. […] Tests used to diagnose appendicitis include: […] A healthcare professional may apply gentle pressure on the painful area. When the pressure is suddenly released, appendicitis pain will often feel worse. This is because of inflammation of the lining of the abdominal cavity, called the peritoneum. […] A care professional also may look for abdominal stiffness and a tendency to flex the abdominal muscles in response to pressure over the inflamed appendix. This is called guarding. […] A care professional also may use a lubricated, gloved finger to examine the lower rectum. This is called a digital rectal exam. People of childbearing age may be given a pelvic exam to check for other problems that could be causing the pain.

• #14 How to perform an abdominal exam for appendicitis | Medmastery

  https://www.medmastery.com/guides/abdominal-examination-clinical-guide/how-perform-abdominal-exam-appendicitis?srsltid=AfmBOoqztq5eeNb2I4CjnIkCfFIQtK40xrjRv_EUE9VNT9yQHpPEAqQt

  Broaden your clinical understanding of the signs of appendicitis during an abdominal exam. […] In adults, the most common surgical diagnoses are acute appendicitis, acute cholecystitis, and small bowel obstruction. […] In this article, we will review appendicitis-related peritoneal signs. […] The psoas sign involves RLQ pain on passive extension of the hip while the patient is in a left lateral decubitus position. […] The obturator sign involves RLQ pain on passive internal rotation of the hip while the patient is in the supine position. […] McBurneys sign involves tenderness with palpation of McBurneys point, which is located at one-third of the distance from the anterior superior iliac spine to the umbilicus. […] Dunphys sign involves increased abdominal pain with coughing, and Rovsings sign is positive when palpation in the left lower quadrant (LLQ) causes referred pain in the RLQ.

• #15 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Appendicitis is one of the most common causes of acute abdominal pain in adults and children, with a lifetime risk of 8.6% in males and 6.7% in females. […] Findings from the history, physical examination, and laboratory studies aid in the diagnosis of acute appendicitis. […] Right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the best signs for ruling in acute appendicitis in adults. […] Absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis in children. […] The Alvarado score, Pediatric Appendicitis Score, and Appendicitis Inflammatory Response score incorporate common clinical and laboratory findings to stratify patients as low, moderate, or high risk and can help in making a timely diagnosis.

• #16 How to perform an abdominal exam for appendicitis | Medmastery

  https://www.medmastery.com/guides/abdominal-examination-clinical-guide/how-perform-abdominal-exam-appendicitis?srsltid=AfmBOoqztq5eeNb2I4CjnIkCfFIQtK40xrjRv_EUE9VNT9yQHpPEAqQt

  Broaden your clinical understanding of the signs of appendicitis during an abdominal exam. […] In adults, the most common surgical diagnoses are acute appendicitis, acute cholecystitis, and small bowel obstruction. […] In this article, we will review appendicitis-related peritoneal signs. […] The psoas sign involves RLQ pain on passive extension of the hip while the patient is in a left lateral decubitus position. […] The obturator sign involves RLQ pain on passive internal rotation of the hip while the patient is in the supine position. […] McBurneys sign involves tenderness with palpation of McBurneys point, which is located at one-third of the distance from the anterior superior iliac spine to the umbilicus. […] Dunphys sign involves increased abdominal pain with coughing, and Rovsings sign is positive when palpation in the left lower quadrant (LLQ) causes referred pain in the RLQ.

• #17 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Appendicitis is one of the most common causes of acute abdominal pain in adults and children, with a lifetime risk of 8.6% in males and 6.7% in females. […] Findings from the history, physical examination, and laboratory studies aid in the diagnosis of acute appendicitis. […] Right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the best signs for ruling in acute appendicitis in adults. […] Absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis in children. […] The Alvarado score, Pediatric Appendicitis Score, and Appendicitis Inflammatory Response score incorporate common clinical and laboratory findings to stratify patients as low, moderate, or high risk and can help in making a timely diagnosis.

• #18 How to perform an abdominal exam for appendicitis | Medmastery

  https://www.medmastery.com/guides/abdominal-examination-clinical-guide/how-perform-abdominal-exam-appendicitis?srsltid=AfmBOoqztq5eeNb2I4CjnIkCfFIQtK40xrjRv_EUE9VNT9yQHpPEAqQt

  Broaden your clinical understanding of the signs of appendicitis during an abdominal exam. […] In adults, the most common surgical diagnoses are acute appendicitis, acute cholecystitis, and small bowel obstruction. […] In this article, we will review appendicitis-related peritoneal signs. […] The psoas sign involves RLQ pain on passive extension of the hip while the patient is in a left lateral decubitus position. […] The obturator sign involves RLQ pain on passive internal rotation of the hip while the patient is in the supine position. […] McBurneys sign involves tenderness with palpation of McBurneys point, which is located at one-third of the distance from the anterior superior iliac spine to the umbilicus. […] Dunphys sign involves increased abdominal pain with coughing, and Rovsings sign is positive when palpation in the left lower quadrant (LLQ) causes referred pain in the RLQ.

• #19 How to perform an abdominal exam for appendicitis | Medmastery

  https://www.medmastery.com/guides/abdominal-examination-clinical-guide/how-perform-abdominal-exam-appendicitis?srsltid=AfmBOoqztq5eeNb2I4CjnIkCfFIQtK40xrjRv_EUE9VNT9yQHpPEAqQt

  Broaden your clinical understanding of the signs of appendicitis during an abdominal exam. […] In adults, the most common surgical diagnoses are acute appendicitis, acute cholecystitis, and small bowel obstruction. […] In this article, we will review appendicitis-related peritoneal signs. […] The psoas sign involves RLQ pain on passive extension of the hip while the patient is in a left lateral decubitus position. […] The obturator sign involves RLQ pain on passive internal rotation of the hip while the patient is in the supine position. […] McBurneys sign involves tenderness with palpation of McBurneys point, which is located at one-third of the distance from the anterior superior iliac spine to the umbilicus. […] Dunphys sign involves increased abdominal pain with coughing, and Rovsings sign is positive when palpation in the left lower quadrant (LLQ) causes referred pain in the RLQ.

• #20 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  To help diagnose appendicitis, a healthcare professional will likely take a history of symptoms and examine the abdomen. […] Tests used to diagnose appendicitis include: […] A healthcare professional may apply gentle pressure on the painful area. When the pressure is suddenly released, appendicitis pain will often feel worse. This is because of inflammation of the lining of the abdominal cavity, called the peritoneum. […] A care professional also may look for abdominal stiffness and a tendency to flex the abdominal muscles in response to pressure over the inflamed appendix. This is called guarding. […] A care professional also may use a lubricated, gloved finger to examine the lower rectum. This is called a digital rectal exam. People of childbearing age may be given a pelvic exam to check for other problems that could be causing the pain.

• #21 Acute appendicitis in adults: Diagnostic evaluation – UpToDate

  https://www.uptodate.com/contents/acute-appendicitis-in-adults-diagnostic-evaluation

  Initial evaluation consists of clinical assessment (ie, history and physical examination) and laboratory evaluation, which is standardized in most emergency departments. Although clinical and laboratory parameters may be suggestive, none are sufficiently sensitive or specific to exclude or diagnose appendicitis. […] The diagnostic accuracy of the clinical evaluation for acute appendicitis depends on the experience of the examining clinician. The patient presenting with acute abdominal pain should undergo a thorough physical examination, including a digital rectal examination. Women should undergo a pelvic examination. Women of reproductive age should be queried regarding the possibility of pregnancy.

• #22 Appendicitis Workup: Approach Considerations, Complete Blood Cell Count, C-Reactive Protein

  https://emedicine.medscape.com/article/773895-workup

  Patients with appendicitis may not have the reported classic clinical picture 37-45% of the time, especially when the appendix is located in an unusual place. […] Laboratory tests are not specific for appendicitis, but they may be helpful to confirm diagnosis in patients with an atypical presentation. […] Studies consistently show that 80-85% of adults with appendicitis have a white blood cell (WBC) count greater than 10,500 cells/L. […] C-reactive protein (CRP) has been reported to be useful in the diagnosis of appendicitis; however, it lacks specificity and cannot be used to distinguish between sites of infection. […] Urinalysis may be useful in differentiating appendicitis from urinary tract conditions. […] Computed tomography (CT) scanning with oral contrast medium or rectal Gastrografin enema has become the most important imaging study in the evaluation of patients with atypical presentations of appendicitis.

• #23 Appendicitis Workup: Approach Considerations, Complete Blood Cell Count, C-Reactive Protein

  https://emedicine.medscape.com/article/773895-workup

  Patients with appendicitis may not have the reported classic clinical picture 37-45% of the time, especially when the appendix is located in an unusual place. […] Laboratory tests are not specific for appendicitis, but they may be helpful to confirm diagnosis in patients with an atypical presentation. […] Studies consistently show that 80-85% of adults with appendicitis have a white blood cell (WBC) count greater than 10,500 cells/L. […] C-reactive protein (CRP) has been reported to be useful in the diagnosis of appendicitis; however, it lacks specificity and cannot be used to distinguish between sites of infection. […] Urinalysis may be useful in differentiating appendicitis from urinary tract conditions. […] Computed tomography (CT) scanning with oral contrast medium or rectal Gastrografin enema has become the most important imaging study in the evaluation of patients with atypical presentations of appendicitis.

• #24 Appendicitis – Wikipedia

  https://en.wikipedia.org/wiki/Appendicitis

  Atypical histories lack this typical progression and may include pain in the right lower quadrant as an initial symptom. […] Atypical histories often require imaging with ultrasound or CT scanning. […] While there is no laboratory test specific for appendicitis, a complete blood count (CBC) is done to check for signs of infection or inflammation. […] Although 70-90 percent of people with appendicitis may have an elevated white blood cell (WBC) count, many other abdominal and pelvic conditions can cause the WBC count to be elevated. […] However, a high WBC count may not alone represent a solid indicator of appendicitis but rather an inflammation but the neutrophil ratio was more sensitive and specific for acute appendicitis. […] Several routine and non-routine laboratory tests have been investigated for discriminating simple and complicated appendicitis, but their diagnostic accuracy is uncertain.

• #25 Appendicitis Workup: Approach Considerations, Complete Blood Cell Count, C-Reactive Protein

  https://emedicine.medscape.com/article/773895-workup

  Patients with appendicitis may not have the reported classic clinical picture 37-45% of the time, especially when the appendix is located in an unusual place. […] Laboratory tests are not specific for appendicitis, but they may be helpful to confirm diagnosis in patients with an atypical presentation. […] Studies consistently show that 80-85% of adults with appendicitis have a white blood cell (WBC) count greater than 10,500 cells/L. […] C-reactive protein (CRP) has been reported to be useful in the diagnosis of appendicitis; however, it lacks specificity and cannot be used to distinguish between sites of infection. […] Urinalysis may be useful in differentiating appendicitis from urinary tract conditions. […] Computed tomography (CT) scanning with oral contrast medium or rectal Gastrografin enema has become the most important imaging study in the evaluation of patients with atypical presentations of appendicitis.

• #26 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  The laboratory evaluation of patients with suspected acute appendicitis should include a total leukocyte count with differential and serum C-reactive protein (CRP) levels. The white blood cell (WBC) count and CRP concentration have a positive predictive value when used together to differentiate between uncomplicated and complicated appendicitis. […] A combination of a normal WBC count and a normal CRP value has a high negative predictive value for acute appendicitis. Increasing CRP and WBC levels significantly increases the likelihood of complicated appendicitis. […] Appendicitis is primarily diagnosed based on clinical evaluation and examination. However, imaging modalities such as computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) may be used to improve the specificity of the presumptive diagnosis. […] CT is the preferred imaging modality in patients with suspected acute appendicitis. Ultrasound is less sensitive and specific than CT for diagnosing appendicitis. However, US is useful in evaluating populations where the avoidance of ionizing radiation is preferred, such as children and pregnant patients.

• #27 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  This test checks for a high white blood cell count. A high white blood cell count may mean there’s an infection. […] A urine test, also called a urinalysis, may be done. A urinalysis makes sure that a urinary tract infection or a kidney stone isn’t causing the pain. […] Imaging tests may help confirm appendicitis or find other causes for pain. These tests may include an abdominal X-ray, an abdominal ultrasound, a CT scan or an MRI. […] Make an appointment with a member of your healthcare team if you have abdominal pain. If you have appendicitis, you’ll likely be hospitalized and referred to a surgeon to remove your appendix.

• #28 Appendicitis Workup: Approach Considerations, Complete Blood Cell Count, C-Reactive Protein

  https://emedicine.medscape.com/article/773895-workup

  Patients with appendicitis may not have the reported classic clinical picture 37-45% of the time, especially when the appendix is located in an unusual place. […] Laboratory tests are not specific for appendicitis, but they may be helpful to confirm diagnosis in patients with an atypical presentation. […] Studies consistently show that 80-85% of adults with appendicitis have a white blood cell (WBC) count greater than 10,500 cells/L. […] C-reactive protein (CRP) has been reported to be useful in the diagnosis of appendicitis; however, it lacks specificity and cannot be used to distinguish between sites of infection. […] Urinalysis may be useful in differentiating appendicitis from urinary tract conditions. […] Computed tomography (CT) scanning with oral contrast medium or rectal Gastrografin enema has become the most important imaging study in the evaluation of patients with atypical presentations of appendicitis.

• #29 Appendicitis – Wikipedia

  https://en.wikipedia.org/wiki/Appendicitis

  In children, neutrophil-lymphocyte ratio (NLR) demonstrates a high degree of accuracy in the diagnosis of acute appendicitis and distinguishes complicated appendicitis from simple appendicitis. […] A C-reactive protein (CRP) blood test will be ordered by the doctor to find out if there are any further causes of inflammation. […] The C-reactive protein/albumin (CRP/ALB) ratio can be a reliable predictor of complicated appendicitis. […] In children, the clinical examination is important to determine which children with abdominal pain should receive immediate surgical consultation and which should receive diagnostic imaging. […] Because of the health risks of exposing children to radiation, ultrasound is the preferred first choice with CT scan being a legitimate follow-up if the ultrasound is inconclusive.

• #30 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  The laboratory evaluation of patients with suspected acute appendicitis should include a total leukocyte count with differential and serum C-reactive protein (CRP) levels. The white blood cell (WBC) count and CRP concentration have a positive predictive value when used together to differentiate between uncomplicated and complicated appendicitis. […] A combination of a normal WBC count and a normal CRP value has a high negative predictive value for acute appendicitis. Increasing CRP and WBC levels significantly increases the likelihood of complicated appendicitis. […] Appendicitis is primarily diagnosed based on clinical evaluation and examination. However, imaging modalities such as computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) may be used to improve the specificity of the presumptive diagnosis. […] CT is the preferred imaging modality in patients with suspected acute appendicitis. Ultrasound is less sensitive and specific than CT for diagnosing appendicitis. However, US is useful in evaluating populations where the avoidance of ionizing radiation is preferred, such as children and pregnant patients.

• #31 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  The Alvarado score is an eight-item, 10-point tool that is the best studied clinical decision rule in adults and children. […] The Pediatric Appendicitis Score includes similar clinical findings in addition to a sign more relevant in children: right lower quadrant pain with coughing, hopping, or percussion. […] A newer tool, the Appendicitis Inflammatory Response score, includes fewer symptoms than the Alvarado score and Pediatric Appendicitis Score, but adds an inflammatory biomarker (C-reactive protein) and allows for different severity levels of rebound pain, leukocytosis, CRP, and polymorphonucleocytes. […] Individually, the white blood cell count and inflammatory biomarkers lack accuracy for the diagnosis of acute appendicitis. […] However, laboratory tests are helpful when combined with signs and symptoms in clinical decision rules, or in combination with imaging studies as part of a structured evaluation.

• #32 Diagnosis of Right Lower Quadrant Pain and Suspected Acute Appendicitis | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/appendicitis/research-protocol

  For patients with right lower quadrant (RLQ) pain, when the diagnosis cannot be made on clinical grounds alone, laboratory or imaging tests are often used to attempt to establish a diagnosis and guide treatment. Laboratory evaluations potentially useful for the diagnosis of appendicitis include white blood cell count, granulocyte count, the proportion of polymorphonuclear blood cells, and C-reactive protein concentration. Imaging tests, such as ultrasound (US), computed tomography (CT) with and without contrast, and magnetic resonance imaging (MRI), are also used extensively for the diagnosis of appendicitis. Imaging tests can be used alone or in combination. […] Clinical signs and symptoms, along with the results of laboratory or imaging tests, can be combined into clinical prediction tools, i.e. algorithms that synthesize the findings of different investigations to determine the most likely diagnosis. In adults, the most commonly used clinical prediction rule for appendicitis is the Alvarado score, which separates patients into 3 groups of increasing probability of appendicitis (the score is based on 8 items: pain migration, anorexia, nausea, tenderness in RLQ, rebound pain, elevated temperature, leukocytosis, and shift of white blood cell count to the left). The Alvarado score is also used in pediatric populations. The Pediatric Appendicitis Score has also been developed and validated for use in children.

• #33 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  The Alvarado score is an eight-item, 10-point tool that is the best studied clinical decision rule in adults and children. […] The Pediatric Appendicitis Score includes similar clinical findings in addition to a sign more relevant in children: right lower quadrant pain with coughing, hopping, or percussion. […] A newer tool, the Appendicitis Inflammatory Response score, includes fewer symptoms than the Alvarado score and Pediatric Appendicitis Score, but adds an inflammatory biomarker (C-reactive protein) and allows for different severity levels of rebound pain, leukocytosis, CRP, and polymorphonucleocytes. […] Individually, the white blood cell count and inflammatory biomarkers lack accuracy for the diagnosis of acute appendicitis. […] However, laboratory tests are helpful when combined with signs and symptoms in clinical decision rules, or in combination with imaging studies as part of a structured evaluation.

• #34 Introductory Chapter: Controversies in the Diagnostics and Management of Acute Appendicitis | IntechOpen

  https://www.intechopen.com/chapters/60893

  Acute appendicitis is one of the most common diseases in urgent surgery. Despite this, it is not always easy to diagnose it, even for experienced surgeons. Acute appendicitis should be suspected in any patient with abdominal pain, and its correct diagnosis in many cases depends on the completeness of anamnestic data. […] There are several clinical scoring systems that are used to diagnose acute appendicitis. In 1986, Alfredo Alvarado developed his score, also called MANTRELS based on the mnemonic for remembering the combination of eight signs and symptoms: migration (1), anorexia-acetone (1), nausea-vomiting (1), tenderness in right lower quadrant (2), rebound pain (1), elevation of temperature (1), leukocytosis (2), shift to the left (1). Each indicator is assigned 12 points, which are then summed. If the sum of points equals numbers from 0 to 4, acute appendicitis is unlikely. The score of 5 or 6 means that acute appendicitis should be suspected and observation is necessary. The score of 7 and 8 signifies that the diagnosis is probable. Acute appendicitis is very likely if the score is 9 or 10.

• #35 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  The Alvarado score is an eight-item, 10-point tool that is the best studied clinical decision rule in adults and children. […] The Pediatric Appendicitis Score includes similar clinical findings in addition to a sign more relevant in children: right lower quadrant pain with coughing, hopping, or percussion. […] A newer tool, the Appendicitis Inflammatory Response score, includes fewer symptoms than the Alvarado score and Pediatric Appendicitis Score, but adds an inflammatory biomarker (C-reactive protein) and allows for different severity levels of rebound pain, leukocytosis, CRP, and polymorphonucleocytes. […] Individually, the white blood cell count and inflammatory biomarkers lack accuracy for the diagnosis of acute appendicitis. […] However, laboratory tests are helpful when combined with signs and symptoms in clinical decision rules, or in combination with imaging studies as part of a structured evaluation.

• #36 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  The Alvarado score is an eight-item, 10-point tool that is the best studied clinical decision rule in adults and children. […] The Pediatric Appendicitis Score includes similar clinical findings in addition to a sign more relevant in children: right lower quadrant pain with coughing, hopping, or percussion. […] A newer tool, the Appendicitis Inflammatory Response score, includes fewer symptoms than the Alvarado score and Pediatric Appendicitis Score, but adds an inflammatory biomarker (C-reactive protein) and allows for different severity levels of rebound pain, leukocytosis, CRP, and polymorphonucleocytes. […] Individually, the white blood cell count and inflammatory biomarkers lack accuracy for the diagnosis of acute appendicitis. […] However, laboratory tests are helpful when combined with signs and symptoms in clinical decision rules, or in combination with imaging studies as part of a structured evaluation.

• #37 Diagnosis and treatment of acute appendicitis: 2020 update of the WSES Jerusalem guidelines | World Journal of Emergency Surgery | Full Text

  https://wjes.biomedcentral.com/articles/10.1186/s13017-020-00306-3

  The AIR score and the AAS score seem currently to be the best performing clinical prediction scores and have the highest discriminating power in adults with suspected acute appendicitis. […] In pediatric patients with suspected acute appendicitis, the Alvarado score and Pediatric Appendicitis Score are useful tools in excluding acute appendicitis. […] The diagnostic accuracy of several biomarker panels has been prospectively validated, showing high sensitivity and negative predictive values for AA in large cohorts of patients with right iliac fossa pain, thereby potentially reducing the dependence on CT for the evaluation of possible AA. […] A single dose of broad-spectrum antibiotics given preoperatively (from 0 to 60min before the surgical skin incision) has been shown to be effective in decreasing wound infection and postoperative intra-abdominal abscess, with no apparent difference in the nature of the removed appendix. […] In patients with complicated acute appendicitis, postoperative broad-spectrum antibiotics are suggested, especially if complete source control has not been achieved.

• #38 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Appendicitis is one of the most common causes of acute abdominal pain in adults and children, with a lifetime risk of 8.6% in males and 6.7% in females. […] Findings from the history, physical examination, and laboratory studies aid in the diagnosis of acute appendicitis. […] Right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the best signs for ruling in acute appendicitis in adults. […] Absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis in children. […] The Alvarado score, Pediatric Appendicitis Score, and Appendicitis Inflammatory Response score incorporate common clinical and laboratory findings to stratify patients as low, moderate, or high risk and can help in making a timely diagnosis.

• #39 Diagnosis of Appendicitis – NIDDK

  https://www.niddk.nih.gov/health-information/digestive-diseases/appendicitis/diagnosis

  To diagnose appendicitis, your doctor will review your symptoms and medical history, perform a physical exam, and order lab tests and imaging tests. […] Your doctor may use imaging tests to find out if your pain is caused by appendicitis. […] Imaging tests can show whether your abdominal pain is caused by a blockage inside the appendix, an enlarged or burst appendix, inflammation, an abscess, or something else. […] Imaging tests can also show if your abdominal pain and other symptoms are not caused by appendicitis, but rather by other conditions such as abdominal adhesions, inflammatory bowel disease, including long-lasting disorders such as Crohns disease and ulcerative colitis, intestinal obstruction, pelvic inflammatory disease, kidney stones, problems with the reproductive system in women.

• #40 Appendicitis – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/diagnosis-treatment/drc-20369549

  This test checks for a high white blood cell count. A high white blood cell count may mean there’s an infection. […] A urine test, also called a urinalysis, may be done. A urinalysis makes sure that a urinary tract infection or a kidney stone isn’t causing the pain. […] Imaging tests may help confirm appendicitis or find other causes for pain. These tests may include an abdominal X-ray, an abdominal ultrasound, a CT scan or an MRI. […] Make an appointment with a member of your healthcare team if you have abdominal pain. If you have appendicitis, you’ll likely be hospitalized and referred to a surgeon to remove your appendix.

• #41 Appendicitis Test: Types, Purpose, Procedure & Results

  https://my.clevelandclinic.org/health/diagnostics/22801-appendicitis-test

  Ultrasound creates pictures of the abdominal contents using sound waves instead of radiation. Its less accurate than a CT scan for diagnosing appendicitis but healthcare providers use abdominal ultrasound instead of CT to diagnose appendicitis in infants, children, young adults and those who are pregnant. […] An inflamed appendix can burst and spread bacteria throughout your body. This can trigger a serious, potentially life-threatening infection (peritonitis). Recognize the early signs of appendicitis so you can get the right diagnosis and treatment. […] Different healthcare providers perform different tests to rule out appendicitis. […] During a physical exam, a healthcare provider may check whether you experience pain when: You lie down on your left side as the provider extends your right thigh and applies pressure to the right hip.

• #42 Appendicitis Test: Types, Purpose, Procedure & Results

  https://my.clevelandclinic.org/health/diagnostics/22801-appendicitis-test

  During a CT scan, you might: Drink a substance called a contrast dye or receive an injection of the dye through your veins. […] A blood test with a high white blood cell count means you have an infection. But about a third of people with appendicitis have a normal white blood cell count. High levels of c-reactive protein in your blood may mean you have inflammation in your body and possibly appendicitis. […] If you have appendicitis, a CT scan or ultrasound may show: An enlarged appendix thats greater than 6 millimeters in diameter. […] An appendicitis test is a series of tests that diagnose appendicitis. Tests typically include a physical exam, blood and urine tests and an imaging test, such as a CT scan or ultrasound. Healthcare providers consider appendicitis to be a medical emergency because your appendix can burst and cause life-threatening complications. If you have constant pain in your abdomen, seek emergency care.

• #43 The Radiology Assistant : Appendicitis – Pitfalls in US and CT diagnosis

  https://radiologyassistant.nl/abdomen/acute-abdomen/appendicitis-pitfalls-in-us-and-ct-diagnosis

  In this chapter we will deal with the optimal diagnostic strategy in patients with suspected appendicitis, and the pitfalls leading to a false-positive or false-negative diagnosis. […] The policy in patients with an acute abdomen in the Netherlands has a well-established scientific basis (Table) (Lameris et al. BMJ 2009;338: b2431). […] CRP and WBC as well as clinical impression, play an important role in choosing between complementary CT scan and watchful waiting. […] Patients with suspected appendicitis are relatively young, and it seems reasonable to begin with US in most patients. […] In most patients with an inconclusive US and a high suspicion of appendicitis, CT is the next step. […] When both US and CT are done, it is important to integrate US and CT findings into a combined report.

• #44 The Radiology Assistant : Appendicitis – Pitfalls in US and CT diagnosis

  https://radiologyassistant.nl/abdomen/acute-abdomen/appendicitis-pitfalls-in-us-and-ct-diagnosis

  The combination of US with optional CT, is highly accurate for appendicitis, and is inconclusive in less than 1% of high-suspicion patients (maybe 2 to 3 patients per year in our hospital). […] The most important reason for a false-negative ultrasound examination is overlooking the inflamed appendix. […] In experienced hands the inflamed appendix can be visualized in 80-90% of patients with acute appendicitis. […] In 7 % of patients with appendicitis, the inflamed appendix has a US diameter of less than 7 mm. […] If there is hypervascularity and inflamed fat and the patient has mild symptoms, this is usually a case of spontaneously resolving appendicitis. […] In some patients, US findings may suggest an alternative condition, while in fact appendicitis is present. […] If enlarged mesenteric lymph nodes are the only US findings in a young patient with RLQ pain, the diagnosis of viral mesenteric lymphadenitis can be considered.

• #45 Acute appendicitis – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/acute-appendicitis/

  While abdominal ultrasound can confirm the diagnosis of acute appendicitis, normal ultrasound findings do not reliably rule out appendicitis. […] CT abdomen is the most accurate initial imaging modality for appendicitis. […] In older adults, imaging is required to confirm a diagnosis of appendicitis.

• #46 How to diagnose acute appendicitis: ultrasound first | Insights into Imaging | Full Text

  https://insightsimaging.springeropen.com/articles/10.1007/s13244-016-0469-6

  Acute appendicitis (AA) is a common abdominal emergency with a lifetime prevalence of about 7 %. As the clinical diagnosis of AA remains a challenge to emergency physicians and surgeons, imaging modalities have gained major importance in the diagnostic work-up of patients with suspected AA in order to keep both the negative appendectomy rate and the perforation rate low. […] In our opinion, US should be the first-line imaging modality, as graded-compression US has excellent specificity both in the paediatric and adult patient populations. […] As US sensitivity is limited, and non-diagnostic US examinations with non-visualization of the appendix are more a rule than an exception, diagnostic strategies and algorithms after non-diagnostic US should focus on clinical reassessment and complementary imaging with MRI/CT if indicated.

• #47 Appendicitis – Wikipedia

  https://en.wikipedia.org/wiki/Appendicitis

  CT scan is more accurate than ultrasound for the diagnosis of appendicitis in adults and adolescents. […] The accurate diagnosis of appendicitis is multi-tiered, with the size of the appendix having the strongest positive predictive value, while indirect features can either increase or decrease sensitivity and specificity. […] A size of over 6 mm is both 95% sensitive and specific for appendicitis. […] The surgical procedure for the removal of the appendix is called an appendectomy. […] A negative appendectomy constitutes the removal of a normal appendix with no sign of inflammation in histopathology examination. […] Appendectomy can be performed through open or laparoscopic surgery. […] Laparoscopic appendectomy has several advantages over open appendectomy as an intervention for acute appendicitis.

• #48 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  The laboratory evaluation of patients with suspected acute appendicitis should include a total leukocyte count with differential and serum C-reactive protein (CRP) levels. The white blood cell (WBC) count and CRP concentration have a positive predictive value when used together to differentiate between uncomplicated and complicated appendicitis. […] A combination of a normal WBC count and a normal CRP value has a high negative predictive value for acute appendicitis. Increasing CRP and WBC levels significantly increases the likelihood of complicated appendicitis. […] Appendicitis is primarily diagnosed based on clinical evaluation and examination. However, imaging modalities such as computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) may be used to improve the specificity of the presumptive diagnosis. […] CT is the preferred imaging modality in patients with suspected acute appendicitis. Ultrasound is less sensitive and specific than CT for diagnosing appendicitis. However, US is useful in evaluating populations where the avoidance of ionizing radiation is preferred, such as children and pregnant patients.

• #49 Acute appendicitis | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/acute-appendicitis-2?lang=us

  Acute appendicitis is an acute inflammation of the vermiform appendix. It is a very common condition in general radiology practice and is one of the main reasons for abdominal surgery in young patients. CT is the most sensitive modality to detect appendicitis. […] Lab testing often reveals leukocytosis and an elevated CRP, and an elevated bilirubin may also be present. Several clinical prediction and decision scores (rules) have been developed to improve diagnostic accuracy and reduce the rate of negative appendectomies, some of which are in routine clinical use: Alvarado score, APPEND score, AIR score, pediatric appendicitis score (PAS), pediatric appendicitis risk calculator (pARC) score. […] CT is highly sensitive (94-98%) and specific (up to 97%) for the diagnosis of acute appendicitis and allows for alternative causes of abdominal pain to be diagnosed. The need for contrast (IV, oral, or both) is debatable and varies from institution to institution. […] MRI is recommended as the second-line modality for suspected acute appendicitis in pregnant patients, where available.

• #50 Appendicitis Uncovered: Recognizing Signs, Understanding Causes, Accurate Diagnosis, and Effective Treatment

  https://www.asterdmhealthcare.com/health-library/appendicitis-uncovered-recognizing-signs-understanding-causes-accurate-diagnosis-and-effective-treatment

  CT offers a quick and thorough evaluation of the right lower side and clearly shows the usual findings, which include a swollen appendix, an appendicolith, peri appendiceal fat infiltration, and localized thickening of the cecum’s base. […] Blood tests are done to check for any signs of inflammation and infection related to appendicitis. Yet appendicitis may not be fully diagnosed with just a blood test. Your doctor may need to run a few more follow-up tests, to be sure. […] The diagnosis of appendicitis involves a comprehensive approach that includes a thorough medical history assessment, a physical examination, and the utilization of imaging tests. […] The recommended treatment for appendicitis is a surgical procedure known as an appendectomy. This procedure involves the removal of the appendix. […] An appendectomy, or removal of the appendix, is the most common (chronic) appendicitis treatment.

• #51 Acute appendicitis | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/acute-appendicitis-2?lang=us

  Acute appendicitis is an acute inflammation of the vermiform appendix. It is a very common condition in general radiology practice and is one of the main reasons for abdominal surgery in young patients. CT is the most sensitive modality to detect appendicitis. […] Lab testing often reveals leukocytosis and an elevated CRP, and an elevated bilirubin may also be present. Several clinical prediction and decision scores (rules) have been developed to improve diagnostic accuracy and reduce the rate of negative appendectomies, some of which are in routine clinical use: Alvarado score, APPEND score, AIR score, pediatric appendicitis score (PAS), pediatric appendicitis risk calculator (pARC) score. […] CT is highly sensitive (94-98%) and specific (up to 97%) for the diagnosis of acute appendicitis and allows for alternative causes of abdominal pain to be diagnosed. The need for contrast (IV, oral, or both) is debatable and varies from institution to institution. […] MRI is recommended as the second-line modality for suspected acute appendicitis in pregnant patients, where available.

• #52 Introductory Chapter: Controversies in the Diagnostics and Management of Acute Appendicitis | IntechOpen

  https://www.intechopen.com/chapters/60893

  Radiological imaging is used more and more to evaluate abdominal pain and diagnose acute appendicitis. On one hand, imaging may be useful in the examination of patients with abdominal pain for establishing or excluding other diagnoses or for averting unnecessary surgery. On the other hand, imaging could possibly delay operation, and in the case of computed tomography (CT), radiologic imaging exposes patients to the risks of ionizing radiation. […] The available data concerning nonoperative management of acute appendicitis is discrepant. Pathologic confirmation of appendicitis is one of the difficulties in performing a well-planned randomized clinical trial of nonoperative versus operative therapy for acute appendicitis. Successful antibiotic therapy for suspected appendicitis may cause doubts about the diagnosis. […] In spite of the fact that acute appendicitis is widespread, optimal diagnostics and management of it remain uncertain. This problem may be solved by conducting large multicenter randomized trials.

• #53 Appendicitis – Diagnosis, Evaluation and Treatment

  https://www.radiologyinfo.org/en/info/appendicitis

  Several tests can be used to evaluate appendicitis: […] Abdominal or pelvic ultrasound may be performed. Ultrasound is a type of imaging exam that uses sound waves to create pictures of the inside of the abdomen and/or pelvis. […] A CT scan of the abdomen and pelvis may be performed. During a CT scan, x-rays are used to capture pictures of the inside of the abdomen and pelvis. CT scan is often the preferred imaging method of diagnosing appendicitis in adults because it is highly accurate. […] In young patients or women who are pregnant, MRI of the pelvis may be performed. MRI obtains pictures of the body using a strong magnet. […] In some cases, an abdominal or chest x-ray may be the initial imaging study. Your doctor may use x-ray to rule out other conditions that cause pain similar to appendicitis, such as pneumonia or bowel obstruction.

• #54 Appendicitis: Diagnosis & Treatment | NewYork-Presbyteriann

  https://www.nyp.org/digestive/appendicitis/treatment

  Imaging tests can help make a definitive diagnosis of appendicitis: […] CT scans (computed tomography scans) use multiple X-rays to take pictures of the inside of the abdomen. This is considered the most accurate test for diagnosing appendicitis. […] Ultrasounds use sound waves to create images of the inside of the abdomen. […] MRIs (magnetic resonance imaging scans) can also be used. Although they are not typically considered a first-line imaging option, they still offer high accuracy and do not expose patients to radiation.

• #55 Acute appendicitis | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/acute-appendicitis-2?lang=us

  Acute appendicitis is an acute inflammation of the vermiform appendix. It is a very common condition in general radiology practice and is one of the main reasons for abdominal surgery in young patients. CT is the most sensitive modality to detect appendicitis. […] Lab testing often reveals leukocytosis and an elevated CRP, and an elevated bilirubin may also be present. Several clinical prediction and decision scores (rules) have been developed to improve diagnostic accuracy and reduce the rate of negative appendectomies, some of which are in routine clinical use: Alvarado score, APPEND score, AIR score, pediatric appendicitis score (PAS), pediatric appendicitis risk calculator (pARC) score. […] CT is highly sensitive (94-98%) and specific (up to 97%) for the diagnosis of acute appendicitis and allows for alternative causes of abdominal pain to be diagnosed. The need for contrast (IV, oral, or both) is debatable and varies from institution to institution. […] MRI is recommended as the second-line modality for suspected acute appendicitis in pregnant patients, where available.

• #56 Appendicitis Workup: Approach Considerations, Complete Blood Cell Count, C-Reactive Protein

  https://emedicine.medscape.com/article/773895-workup

  Patients with appendicitis may not have the reported classic clinical picture 37-45% of the time, especially when the appendix is located in an unusual place. […] Laboratory tests are not specific for appendicitis, but they may be helpful to confirm diagnosis in patients with an atypical presentation. […] Studies consistently show that 80-85% of adults with appendicitis have a white blood cell (WBC) count greater than 10,500 cells/L. […] C-reactive protein (CRP) has been reported to be useful in the diagnosis of appendicitis; however, it lacks specificity and cannot be used to distinguish between sites of infection. […] Urinalysis may be useful in differentiating appendicitis from urinary tract conditions. […] Computed tomography (CT) scanning with oral contrast medium or rectal Gastrografin enema has become the most important imaging study in the evaluation of patients with atypical presentations of appendicitis.

• #57 Acute appendicitis – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/acute-appendicitis/

  Acute appendicitis is usually a clinical diagnosis supported by laboratory findings (e.g., leukocytosis with left shift). Confirmatory imaging is recommended if the diagnosis is uncertain. […] Diagnostic imaging is often performed for most patients. A selective and individualized approach is generally recommended to minimize patient exposure to radiation and expedite care. […] A normal WBC count does not rule out acute appendicitis. […] Decisions regarding the optimal timing and initial imaging modality should be based on individual patient factors (e.g., demographics, likelihood of appendicitis, risk of alternate diagnoses of concern, comorbidities), available resources, and local specialist preferences and hospital policy. […] The combined use of appendicitis risk scores and an initial ultrasound abdomen can reduce the need for CT abdomen in certain patients with suspected appendicitis, however, this should be balanced with the risk of missing the diagnosis.

• #58 The Radiology Assistant : Appendicitis – Pitfalls in US and CT diagnosis

  https://radiologyassistant.nl/abdomen/acute-abdomen/appendicitis-pitfalls-in-us-and-ct-diagnosis

  In this chapter we will deal with the optimal diagnostic strategy in patients with suspected appendicitis, and the pitfalls leading to a false-positive or false-negative diagnosis. […] The policy in patients with an acute abdomen in the Netherlands has a well-established scientific basis (Table) (Lameris et al. BMJ 2009;338: b2431). […] CRP and WBC as well as clinical impression, play an important role in choosing between complementary CT scan and watchful waiting. […] Patients with suspected appendicitis are relatively young, and it seems reasonable to begin with US in most patients. […] In most patients with an inconclusive US and a high suspicion of appendicitis, CT is the next step. […] When both US and CT are done, it is important to integrate US and CT findings into a combined report.

• #59

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  Ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) have high diagnostic accuracy in the diagnosis of acute appendicitis. Nowadays imaging is part of the diagnostic algorithm of appendicitis and the advantages are demonstrated by the reduced negative appendectomies rates. US is the preferred first line imaging in acute appendicitis. […] The Acute Appendicitis (AA) diagnosis is assessed by combining clinical scores, laboratory data and imaging results. […] Imaging significantly reduces the rate of negative appendicectomies in case of suspected AA. Ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) are highly accurate for the diagnosis of AA, but according to the WSES Jerusalem guidelines (2020), US examination should be the first-line imaging.

• #60 Appendicitis: Signs, Symptoms and Diagnosis | Children’s Hospital Los Angeles

  https://www.chla.org/blog/advice-experts/appendicitis-signs-symptoms-and-diagnosis

  Children may not be able to give the specifics of their pain or symptoms. So it’s crucial for parents to be aware of their child’s symptoms and act quickly if they suspect appendicitis. […] Appendicitis can occur at any age, and according to statistics, it’s slightly more common in males than females. The condition very easy to mistake for a stomachache, so it’s important to bring your child to the emergency room if they’re exhibiting the symptoms listed below: Abdominal pain that comes on suddenly and occurs before other symptoms. Pain that most often begins near the belly button and moves to the lower right side of the abdomen. Pain that gets progressively worse. Loss of appetite, nausea, vomiting or fever. […] When a blockage occurs in the appendix, you can get appendicitis. […] Therefore, appendicitis means „inflamed appendix.” An inflamed appendix can burst if the inflammation is not treated or the appendix is not removed in a timely manner. In young children, it’s not uncommon to see a burst appendix. The source of the abdominal pain or fever is sometimes difficult to determine in younger children. Young patients may not be able to give the specifics of their pain or symptoms, occasionally leading to a late diagnosis or an incorrect early diagnosis. That’s why it is so crucial for parents to be aware of their child’s symptoms and act quickly if they suspect appendicitis.

• #61 Appendicitis – Wikipedia

  https://en.wikipedia.org/wiki/Appendicitis

  The diagnosis of appendicitis is largely based on the person’s signs and symptoms. […] In cases where the diagnosis is unclear, close observation, medical imaging, and laboratory tests can be helpful. […] The two most commonly used imaging tests for diagnosing appendicitis are ultrasound and computed tomography (CT scan). […] CT scan is more accurate than ultrasound in detecting acute appendicitis. […] However, ultrasound may be preferred as the first imaging test in children and pregnant women because of the risks associated with radiation exposure from CT scans. […] Although ultrasound may aid in diagnosis, its main role is in identifying important differentials, such as ovarian pathology in females or mesenteric adenitis in children. […] Typical appendicitis is characterized by a migratory right iliac fossa pain associated with nausea, and anorexia, which can occur with or without vomiting and localized muscle stiffness/generalized guarding.

• #62 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  The laboratory evaluation of patients with suspected acute appendicitis should include a total leukocyte count with differential and serum C-reactive protein (CRP) levels. The white blood cell (WBC) count and CRP concentration have a positive predictive value when used together to differentiate between uncomplicated and complicated appendicitis. […] A combination of a normal WBC count and a normal CRP value has a high negative predictive value for acute appendicitis. Increasing CRP and WBC levels significantly increases the likelihood of complicated appendicitis. […] Appendicitis is primarily diagnosed based on clinical evaluation and examination. However, imaging modalities such as computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) may be used to improve the specificity of the presumptive diagnosis. […] CT is the preferred imaging modality in patients with suspected acute appendicitis. Ultrasound is less sensitive and specific than CT for diagnosing appendicitis. However, US is useful in evaluating populations where the avoidance of ionizing radiation is preferred, such as children and pregnant patients.

• #63 The Radiology Assistant : Appendicitis – Pitfalls in US and CT diagnosis

  https://radiologyassistant.nl/abdomen/acute-abdomen/appendicitis-pitfalls-in-us-and-ct-diagnosis

  The combination of US with optional CT, is highly accurate for appendicitis, and is inconclusive in less than 1% of high-suspicion patients (maybe 2 to 3 patients per year in our hospital). […] The most important reason for a false-negative ultrasound examination is overlooking the inflamed appendix. […] In experienced hands the inflamed appendix can be visualized in 80-90% of patients with acute appendicitis. […] In 7 % of patients with appendicitis, the inflamed appendix has a US diameter of less than 7 mm. […] If there is hypervascularity and inflamed fat and the patient has mild symptoms, this is usually a case of spontaneously resolving appendicitis. […] In some patients, US findings may suggest an alternative condition, while in fact appendicitis is present. […] If enlarged mesenteric lymph nodes are the only US findings in a young patient with RLQ pain, the diagnosis of viral mesenteric lymphadenitis can be considered.

• #64 Diagnosis of Right Lower Quadrant Pain and Suspected Acute Appendicitis | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/appendicitis/research-protocol

  The diagnosis of appendicitis is particularly challenging in some population subgroups, including children, women of reproductive age, pregnant women, and frail or elderly patients. […] The reliable identification of patients with RLQ pain who need surgical intervention for acute appendicitis can improve clinical outcomes and reduce resource utilization. Our review of guidelines and published systematic reviews indicates a lack of specific guidance for selecting diagnostic modalities, particularly in patient subgroups in whom the diagnosis is known to be particularly challenging (e.g., children, women of reproductive age, and pregnant women).

• #65 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  Although negative appendectomy does not appear to adversely affect maternal or fetal health, diagnostic delay with perforation does increase fetal and maternal morbidity. Therefore, aggressive evaluation of the appendix is warranted in pregnant women. […] Appendicitis is misdiagnosed in 25-30% of children, and the rate of initial misdiagnosis is inversely related to the age of the patient. […] The incidence of misdiagnosis is increased in elderly patients. […] Older patients tend to seek medical attention later in the course of illness; therefore, a duration of symptoms in excess of 24-48 hours should not dissuade the clinician from the diagnosis.

• #66 Appendicitis: Signs, Symptoms and Diagnosis | Children’s Hospital Los Angeles

  https://www.chla.org/blog/advice-experts/appendicitis-signs-symptoms-and-diagnosis

  Children may not be able to give the specifics of their pain or symptoms. So it’s crucial for parents to be aware of their child’s symptoms and act quickly if they suspect appendicitis. […] Appendicitis can occur at any age, and according to statistics, it’s slightly more common in males than females. The condition very easy to mistake for a stomachache, so it’s important to bring your child to the emergency room if they’re exhibiting the symptoms listed below: Abdominal pain that comes on suddenly and occurs before other symptoms. Pain that most often begins near the belly button and moves to the lower right side of the abdomen. Pain that gets progressively worse. Loss of appetite, nausea, vomiting or fever. […] When a blockage occurs in the appendix, you can get appendicitis. […] Therefore, appendicitis means „inflamed appendix.” An inflamed appendix can burst if the inflammation is not treated or the appendix is not removed in a timely manner. In young children, it’s not uncommon to see a burst appendix. The source of the abdominal pain or fever is sometimes difficult to determine in younger children. Young patients may not be able to give the specifics of their pain or symptoms, occasionally leading to a late diagnosis or an incorrect early diagnosis. That’s why it is so crucial for parents to be aware of their child’s symptoms and act quickly if they suspect appendicitis.

• #67 Appendicitis

  https://www.pch.health.wa.gov.au/For-health-professionals/Emergency-Department-Guidelines/Appendicitis

  Appendicitis is one of the most common surgical conditions of the abdomen. […] Although today it is regarded as a simple disease, it remains the most commonly misdiagnosed surgical emergency. […] Appendicitis usually results from luminal obstruction of the appendix, followed by infection. […] Appendicitis, when it presents in the classic way, is easy to diagnose clinically. […] However, appendicitis is notorious for its protean manifestations, and no single symptom, sign or diagnostic test is reliable on its own in making the diagnosis. […] In children, the mainstay of the diagnosis of appendicitis is a good history and repeated physical examinations. […] Other than urinalysis to exclude a urinary tract infection (UTI), special investigations are usually not indicated. […] In all cases where appendicitis is suspected, a urine should be checked to exclude urinary tract infections.

• #68 How to Diagnose Appendicitis in a Child | EM Ultrasound Section

  https://www.acep.org/emultrasound/newsroom/may-2022/how-to-diagnose-appendicitis-in-a-child

  The appendix is most reliably found in the right lower quadrant; the base extends from the proximal cecum and lies anterior to the psoas muscle and the right iliac vessels. […] When appendicitis is present, the appendix will measure greater than 6 mm from outer wall to outer wall, with a wall thickness greater than 3 mm and lack compressibility. […] An inflamed appendix can demonstrate a ring of fire with enhanced color flow. […] A recent publication promotes the use of ultrasound in pediatrics and using MRI or CT scan for non-diagnostic or equivocal cases. […] By becoming more comfortable with your pediatric appendix ultrasound you will be able to augment your clinical gestalt, narrow your differential quickly with a positive scan, have healthy conversations with consultants, and nail the diagnosis.

• #69 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  The overall accuracy for diagnosing acute appendicitis is approximately 80%, which corresponds to a mean negative appendectomy rate of 20%. Diagnostic accuracy varies by sex, with a range of 78-92% in male patients and 58-85% in female patients. […] The classic history of anorexia and periumbilical pain followed by nausea, right lower quadrant (RLQ) pain, and vomiting occurs in only 50% of cases. Vomiting that precedes pain is suggestive of intestinal obstruction, and the diagnosis of appendicitis should be reconsidered. […] The differential diagnosis of appendicitis is often a clinical challenge because appendicitis can mimic several abdominal conditions. […] Appendicitis is misdiagnosed in 33% of nonpregnant women of childbearing age. The most frequent misdiagnoses are PID, followed by gastroenteritis and urinary tract infection.

• #70 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  The overall accuracy for diagnosing acute appendicitis is approximately 80%, which corresponds to a mean negative appendectomy rate of 20%. Diagnostic accuracy varies by sex, with a range of 78-92% in male patients and 58-85% in female patients. […] The classic history of anorexia and periumbilical pain followed by nausea, right lower quadrant (RLQ) pain, and vomiting occurs in only 50% of cases. Vomiting that precedes pain is suggestive of intestinal obstruction, and the diagnosis of appendicitis should be reconsidered. […] The differential diagnosis of appendicitis is often a clinical challenge because appendicitis can mimic several abdominal conditions. […] Appendicitis is misdiagnosed in 33% of nonpregnant women of childbearing age. The most frequent misdiagnoses are PID, followed by gastroenteritis and urinary tract infection.

• #71 Acute appendicitis in adults: Diagnostic evaluation – UpToDate

  https://www.uptodate.com/contents/acute-appendicitis-in-adults-diagnostic-evaluation

  Initial evaluation consists of clinical assessment (ie, history and physical examination) and laboratory evaluation, which is standardized in most emergency departments. Although clinical and laboratory parameters may be suggestive, none are sufficiently sensitive or specific to exclude or diagnose appendicitis. […] The diagnostic accuracy of the clinical evaluation for acute appendicitis depends on the experience of the examining clinician. The patient presenting with acute abdominal pain should undergo a thorough physical examination, including a digital rectal examination. Women should undergo a pelvic examination. Women of reproductive age should be queried regarding the possibility of pregnancy.

• #72 Appendicitis: Symptoms and Treatment | Doctor

  https://patient.info/doctor/appendicitis-pro

  Imaging is a useful diagnostic tool in suspected appendicitis, and its use is increasing. It is most useful in patients where the diagnosis is indeterminate. […] Ultrasound is useful, and tends to be preferred in children, young people, and pregnant patients, due to the radiation risk associated with CT. […] CT scanning is more sensitive and specific than ultrasound when diagnosing acute appendicitis. […] Diagnostic laparoscopy may be considered.

• #73 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Recommended first-line imaging consists of point-of-care or formal ultrasonography. […] Diagnosing acute appendicitis accurately and efficiently can reduce morbidity and mortality from perforation and other complications. […] The variable location of the appendix causes variations in the clinical presentation, making diagnosis challenging, especially in pregnant women. […] The signs and symptoms that best rule in acute appendicitis in adults are right lower quadrant pain, abdominal rigidity, and radiation of periumbilical pain to the right lower quadrant. […] In children, however, absent or decreased bowel sounds, a positive psoas sign, a positive obturator sign, and a positive Rovsing sign are most reliable for ruling in acute appendicitis. […] Several clinical decision rules that incorporate findings from the patient’s history, physical examination, and laboratory tests have been developed and validated in a range of populations.

• #74 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  Although negative appendectomy does not appear to adversely affect maternal or fetal health, diagnostic delay with perforation does increase fetal and maternal morbidity. Therefore, aggressive evaluation of the appendix is warranted in pregnant women. […] Appendicitis is misdiagnosed in 25-30% of children, and the rate of initial misdiagnosis is inversely related to the age of the patient. […] The incidence of misdiagnosis is increased in elderly patients. […] Older patients tend to seek medical attention later in the course of illness; therefore, a duration of symptoms in excess of 24-48 hours should not dissuade the clinician from the diagnosis.

• #75 Acute appendicitis | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/acute-appendicitis-2?lang=us

  Acute appendicitis is an acute inflammation of the vermiform appendix. It is a very common condition in general radiology practice and is one of the main reasons for abdominal surgery in young patients. CT is the most sensitive modality to detect appendicitis. […] Lab testing often reveals leukocytosis and an elevated CRP, and an elevated bilirubin may also be present. Several clinical prediction and decision scores (rules) have been developed to improve diagnostic accuracy and reduce the rate of negative appendectomies, some of which are in routine clinical use: Alvarado score, APPEND score, AIR score, pediatric appendicitis score (PAS), pediatric appendicitis risk calculator (pARC) score. […] CT is highly sensitive (94-98%) and specific (up to 97%) for the diagnosis of acute appendicitis and allows for alternative causes of abdominal pain to be diagnosed. The need for contrast (IV, oral, or both) is debatable and varies from institution to institution. […] MRI is recommended as the second-line modality for suspected acute appendicitis in pregnant patients, where available.

• #76 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  Although negative appendectomy does not appear to adversely affect maternal or fetal health, diagnostic delay with perforation does increase fetal and maternal morbidity. Therefore, aggressive evaluation of the appendix is warranted in pregnant women. […] Appendicitis is misdiagnosed in 25-30% of children, and the rate of initial misdiagnosis is inversely related to the age of the patient. […] The incidence of misdiagnosis is increased in elderly patients. […] Older patients tend to seek medical attention later in the course of illness; therefore, a duration of symptoms in excess of 24-48 hours should not dissuade the clinician from the diagnosis.

• #77 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  Although negative appendectomy does not appear to adversely affect maternal or fetal health, diagnostic delay with perforation does increase fetal and maternal morbidity. Therefore, aggressive evaluation of the appendix is warranted in pregnant women. […] Appendicitis is misdiagnosed in 25-30% of children, and the rate of initial misdiagnosis is inversely related to the age of the patient. […] The incidence of misdiagnosis is increased in elderly patients. […] Older patients tend to seek medical attention later in the course of illness; therefore, a duration of symptoms in excess of 24-48 hours should not dissuade the clinician from the diagnosis.

• #78 Acute appendicitis – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/acute-appendicitis/

  While abdominal ultrasound can confirm the diagnosis of acute appendicitis, normal ultrasound findings do not reliably rule out appendicitis. […] CT abdomen is the most accurate initial imaging modality for appendicitis. […] In older adults, imaging is required to confirm a diagnosis of appendicitis.

• #79 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #80 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #81 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #82 Diagnosis of Appendicitis – NIDDK

  https://www.niddk.nih.gov/health-information/digestive-diseases/appendicitis/diagnosis

  To diagnose appendicitis, your doctor will review your symptoms and medical history, perform a physical exam, and order lab tests and imaging tests. […] Your doctor may use imaging tests to find out if your pain is caused by appendicitis. […] Imaging tests can show whether your abdominal pain is caused by a blockage inside the appendix, an enlarged or burst appendix, inflammation, an abscess, or something else. […] Imaging tests can also show if your abdominal pain and other symptoms are not caused by appendicitis, but rather by other conditions such as abdominal adhesions, inflammatory bowel disease, including long-lasting disorders such as Crohns disease and ulcerative colitis, intestinal obstruction, pelvic inflammatory disease, kidney stones, problems with the reproductive system in women.

• #83 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #84 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #85 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #86 Appendicitis Differential Diagnoses

  https://emedicine.medscape.com/article/773895-differential

  The overall accuracy for diagnosing acute appendicitis is approximately 80%, which corresponds to a mean negative appendectomy rate of 20%. Diagnostic accuracy varies by sex, with a range of 78-92% in male patients and 58-85% in female patients. […] The classic history of anorexia and periumbilical pain followed by nausea, right lower quadrant (RLQ) pain, and vomiting occurs in only 50% of cases. Vomiting that precedes pain is suggestive of intestinal obstruction, and the diagnosis of appendicitis should be reconsidered. […] The differential diagnosis of appendicitis is often a clinical challenge because appendicitis can mimic several abdominal conditions. […] Appendicitis is misdiagnosed in 33% of nonpregnant women of childbearing age. The most frequent misdiagnoses are PID, followed by gastroenteritis and urinary tract infection.

• #87 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #88 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #89 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #90 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Appendicitis has several differential diagnoses, including, but not limited to: Gastroenteritis, Ectopic pregnancy, Crohns disease, Urinary tract infection, Ovarian torsion, Ruptured Graafian follicle, Kidney stones, Meckel diverticulitis, Intussusception (in children), Peptic ulcer disease, Pelvic inflammatory disease, Other infections (adenitis, peritonitis, cholecystitis). […] These differential diagnoses can make appendicitis difficult to firmly diagnose. Its particularly tricky to diagnose in children, as they arent able to articulate their pain and symptoms as well as adults can. […] Generally, the diagnostic process will involve physical examination and discussion with the patient about their symptoms. Medical imaging (ultrasound or CT scan) and blood tests might also be used, although they cant give definite answers.

• #91

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  A multidisciplinary approach involving clinical assessment, scoring systems, and appropriate imaging is essential for accurate diagnosis and optimal patient care in suspected acute appendicitis. Each component of this approach contributes to overall diagnostic accuracy and helps healthcare professionals for the correct management. […] The US should be the first imaging modality to approach patients with suspected appendicitis, but the non-visualization or non-complete visualization of the appendix do not exclude appendicitis. Furthermore, there are different scenarios that require a second line imaging: when the appendix is non visualized, when there are too many inflammatory changes or parietal thickening of cecum and ileum, and when the inflammatory process is extremely severe determining the chaos in the RLQ.

• #92 The Radiology Assistant : Appendicitis – Pitfalls in US and CT diagnosis

  https://radiologyassistant.nl/abdomen/acute-abdomen/appendicitis-pitfalls-in-us-and-ct-diagnosis

  In this chapter we will deal with the optimal diagnostic strategy in patients with suspected appendicitis, and the pitfalls leading to a false-positive or false-negative diagnosis. […] The policy in patients with an acute abdomen in the Netherlands has a well-established scientific basis (Table) (Lameris et al. BMJ 2009;338: b2431). […] CRP and WBC as well as clinical impression, play an important role in choosing between complementary CT scan and watchful waiting. […] Patients with suspected appendicitis are relatively young, and it seems reasonable to begin with US in most patients. […] In most patients with an inconclusive US and a high suspicion of appendicitis, CT is the next step. […] When both US and CT are done, it is important to integrate US and CT findings into a combined report.

• #93 Appendicitis: Recognising the Signs | Ausmed

  https://www.ausmed.com/learn/articles/appendicitis

  Due to the extremely serious nature of the illness and the need for timely intervention, surgery might be indicated even if the diagnosis isnt clear. […] The Alvarado score (MANTRELS) is a validated assessment tool designed to assist in the diagnosis of appendicitis. […] The patients score for each present symptom should then be added together: 4 Appendicitis is unlikely, 4 to 6 Further imaging is required to determine whether appendicitis is present, 7 Appendicitis is likely. […] According to the Emergency Care Institute (2023), the management pathway for suspected appendicitis in non-pregnant patients is to: Resuscitate the patient if they are initially unstable, Consider differential diagnoses, Undertake a thorough assessment if the patient is stable, Perform medical imaging if appendicitis is suspected but still unclear, Provide supportive care, i.e. nil by mouth, intravenous fluids and analgesic medicines, Perform an appendectomy. […] Appendectomy is generally the first-line treatment method for appendicitis.

• #94 Convolutional-neural-network-based diagnosis of appendicitis via CT scans in patients with acute abdominal pain presenting in the emergency department | Scientific Reports

  https://www.nature.com/articles/s41598-020-66674-7

  Acute appendicitis is one of the most common causes of abdominal emergencies. […] The diagnosis of acute appendicitis is still challenging, although many studies have been performed. Misdiagnosis or delayed diagnosis increases the incidence of perforation, peritonitis and negative laparotomy, which are associated with morbidity and mortality. […] Therefore, a quick and accurate diagnosis of acute appendicitis is necessary for efficient clinical care of acute abdominal pain. […] However, diagnostic errors are common because symptoms are frequently unspecified and overlap with other diseases. […] The diagnosis of acute appendicitis is difficult even after physical examination by an expert and with laboratory findings. […] To improve the diagnostic performance, clinical scoring systems such as the Alvarado score, pediatric appendicitis score, appendicitis inflammatory response score and RIPASA score have been proposed to stratify patients with suspected appendicitis based on specific symptoms, signs, and laboratory data.

• #95 Appendicitis Diagnosis: Ensemble Machine Learning and Explainable Artificial Intelligence-Based Comprehensive Approach

  https://www.mdpi.com/2504-2289/8/9/108

  Appendicitis is a condition wherein the appendix becomes inflamed, and it can be difficult to diagnose accurately. […] To avoid complications and reduce mortality, early diagnosis and treatment are crucial. […] This study proposes the use of machine learning methods and a locally collected reliable dataset to enhance the identification of acute appendicitis while detecting the differences between complicated and non-complicated appendicitis. […] An early diagnosis and treatment of acute appendicitis are necessary to prevent further complications. […] The diagnosis of appendicitis is challenging because more than half of all appendicitis patients do not exhibit typical symptoms. […] The signs and symptoms of appendicitis are unpredictable, with only 50% of cases presenting with anorexia and periumbilical pain, followed by nausea, right lower quadrant (RLQ) pain, and vomiting.

• #96 Convolutional-neural-network-based diagnosis of appendicitis via CT scans in patients with acute abdominal pain presenting in the emergency department | Scientific Reports

  https://www.nature.com/articles/s41598-020-66674-7

  The diagnostic performance of the CNN-based algorithm for the diagnosis of acute appendicitis for all image sets was excellent: the sensitivity, and specificity were 90.2% and 92.0%, respectively. […] In conclusion, the CNN-based diagnosis algorithm may be feasible in diagnosing acute appendicitis using the CT data of patients visiting the ER with acute abdominal pain.

• #97 Appendicitis Diagnosis: Ensemble Machine Learning and Explainable Artificial Intelligence-Based Comprehensive Approach

  https://www.mdpi.com/2504-2289/8/9/108

  The diagnosis of appendicitis can be complicated by the presence of atypical symptoms, which may lead to misdiagnosis. […] The proposed ML models have clearly shown the potential value in not only diagnosing appendicitis but also distinguishing between complicated and non-complicated. […] The significant improvement can be attributed to SMOTE–Tomek’s capacity to artificially create new instances that exhibit a reasonable degree of variation from the original records. […] The experimental results showed that the stacking model had the highest training accuracy, test set accuracy, precision, and F1 score. […] Feature importance and explainable AI identified the principal features that significantly affected the performance of the model. […] Based on the outcomes and feedback from medical health professionals, the scheme is promising in terms of its effectiveness in the diagnosis of acute appendicitis.

• #98 Appendicitis Diagnosis: Ensemble Machine Learning and Explainable Artificial Intelligence-Based Comprehensive Approach

  https://www.mdpi.com/2504-2289/8/9/108

  The diagnosis of appendicitis can be complicated by the presence of atypical symptoms, which may lead to misdiagnosis. […] The proposed ML models have clearly shown the potential value in not only diagnosing appendicitis but also distinguishing between complicated and non-complicated. […] The significant improvement can be attributed to SMOTE–Tomek’s capacity to artificially create new instances that exhibit a reasonable degree of variation from the original records. […] The experimental results showed that the stacking model had the highest training accuracy, test set accuracy, precision, and F1 score. […] Feature importance and explainable AI identified the principal features that significantly affected the performance of the model. […] Based on the outcomes and feedback from medical health professionals, the scheme is promising in terms of its effectiveness in the diagnosis of acute appendicitis.

• #99

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  The role of imaging in the scenarios of operative or non-operative management requires accurate distinction between complicated appendicitis with high risk of perforation and uncomplicated appendicitis. […] Differentiation between a complicated and uncomplicated AA is crucial for the correct management. The presence of an appendicolith is an independent prognostic risk factor for treatment failure in NOM of uncomplicated AA, in these cases, an early surgical approach is recommended. […] The presence of abscess or periappendiceal phlegmon indicated a complicate appendicitis with perforation. […] The role of the US in staging appendicitis is not accurately stated, although US can represent a definitive diagnostic modality in selected case. […] In spite of the high accuracy of CT and US in selected patients, no safe differentiation between uncomplicated and complicated forms can be made upon imaging alone. Hence, a combination of clinical scores, laboratory value (white blood cell count and C-reactive Protein), US, and CT findings are usually preferred to reach a correct diagnosis.

• #100

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  The role of imaging in the scenarios of operative or non-operative management requires accurate distinction between complicated appendicitis with high risk of perforation and uncomplicated appendicitis. […] Differentiation between a complicated and uncomplicated AA is crucial for the correct management. The presence of an appendicolith is an independent prognostic risk factor for treatment failure in NOM of uncomplicated AA, in these cases, an early surgical approach is recommended. […] The presence of abscess or periappendiceal phlegmon indicated a complicate appendicitis with perforation. […] The role of the US in staging appendicitis is not accurately stated, although US can represent a definitive diagnostic modality in selected case. […] In spite of the high accuracy of CT and US in selected patients, no safe differentiation between uncomplicated and complicated forms can be made upon imaging alone. Hence, a combination of clinical scores, laboratory value (white blood cell count and C-reactive Protein), US, and CT findings are usually preferred to reach a correct diagnosis.

• #101

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  The role of imaging in the scenarios of operative or non-operative management requires accurate distinction between complicated appendicitis with high risk of perforation and uncomplicated appendicitis. […] Differentiation between a complicated and uncomplicated AA is crucial for the correct management. The presence of an appendicolith is an independent prognostic risk factor for treatment failure in NOM of uncomplicated AA, in these cases, an early surgical approach is recommended. […] The presence of abscess or periappendiceal phlegmon indicated a complicate appendicitis with perforation. […] The role of the US in staging appendicitis is not accurately stated, although US can represent a definitive diagnostic modality in selected case. […] In spite of the high accuracy of CT and US in selected patients, no safe differentiation between uncomplicated and complicated forms can be made upon imaging alone. Hence, a combination of clinical scores, laboratory value (white blood cell count and C-reactive Protein), US, and CT findings are usually preferred to reach a correct diagnosis.

• #102

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  The role of imaging in the scenarios of operative or non-operative management requires accurate distinction between complicated appendicitis with high risk of perforation and uncomplicated appendicitis. […] Differentiation between a complicated and uncomplicated AA is crucial for the correct management. The presence of an appendicolith is an independent prognostic risk factor for treatment failure in NOM of uncomplicated AA, in these cases, an early surgical approach is recommended. […] The presence of abscess or periappendiceal phlegmon indicated a complicate appendicitis with perforation. […] The role of the US in staging appendicitis is not accurately stated, although US can represent a definitive diagnostic modality in selected case. […] In spite of the high accuracy of CT and US in selected patients, no safe differentiation between uncomplicated and complicated forms can be made upon imaging alone. Hence, a combination of clinical scores, laboratory value (white blood cell count and C-reactive Protein), US, and CT findings are usually preferred to reach a correct diagnosis.

• #103 What is the jump test for appendicitis? | UPMC HealthBeat

  https://share.upmc.com/2024/12/jump-test-appendicitis/

  Quick, early indicators of appendicitis, like the jump test, are necessary because of the severity of untreated appendicitis. […] These complications highlight the necessity of early detection and treatment of appendicitis. Delays in treatment increase the risk of these complications and can lead to longer recovery times and more complex risks. Understanding these risks underscores the urgency and importance of seeking medical care. […] Early diagnosis and treatment for appendicitis is less severe than complications of a ruptured appendix. Standard treatment involves a minimally invasive surgical removal of the appendix, followed by a course of antibiotics to treat infection.

• #104 Acute Appendicitis: Symptoms, Diagnosis, and Treatment

  https://resources.healthgrades.com/right-care/appendectomy/acute-appendicitis

  Getting prompt care for symptoms of acute appendicitis can reduce your risk of complications and allow for faster, more effective treatment. […] Early appendectomy is the most effective treatment for acute appendicitis. […] Removing the appendix before it ruptures helps prevent serious complications such as peritonitis or abscess. […] Doctors typically choose from two types of surgery to remove an inflamed appendix. […] Depending on the severity of the appendicitis and the type of surgery doctors perform, many people go home from the hospital the same day. […] Acute appendicitis symptoms typically progress quickly, within 24 hours of starting. […] The risk of rupture is low at the beginning of acute appendicitis, but goes up steadily and becomes high after 48 hours or more. […] Contact your primary care doctor or pediatrician right away for any symptoms of appendicitis to lower the risk of serious or life threatening complications.

• #105 Appendicitis – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/symptoms-causes/syc-20369543

  The appendix is a narrow, finger-shaped pouch that sticks out from the colon. Appendicitis occurs when the appendix becomes inflamed and filled with pus. […] Appendicitis is an inflammation of the appendix. […] Treatment of appendicitis is usually antibiotics and, in most instances, surgery to remove the appendix. […] Make an appointment with a healthcare professional if you or your child has symptoms. Terrible belly pain requires immediate medical attention. […] A blockage in the lining of the appendix, called the lumen, is the likely cause of appendicitis. This blockage can cause an infection. […] Appendicitis may cause serious complications, such as a burst appendix. A burst appendix, also called ruptured appendix, spreads infection throughout the abdomen, a condition called peritonitis. […] If the appendix bursts, a pocket of infection may develop. This is called an abscess. In most cases, a surgeon drains the abscess by placing a tube through the abdominal wall into the abscess.

• #106 Appendicitis – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/symptoms-causes/syc-20369543

  The appendix is a narrow, finger-shaped pouch that sticks out from the colon. Appendicitis occurs when the appendix becomes inflamed and filled with pus. […] Appendicitis is an inflammation of the appendix. […] Treatment of appendicitis is usually antibiotics and, in most instances, surgery to remove the appendix. […] Make an appointment with a healthcare professional if you or your child has symptoms. Terrible belly pain requires immediate medical attention. […] A blockage in the lining of the appendix, called the lumen, is the likely cause of appendicitis. This blockage can cause an infection. […] Appendicitis may cause serious complications, such as a burst appendix. A burst appendix, also called ruptured appendix, spreads infection throughout the abdomen, a condition called peritonitis. […] If the appendix bursts, a pocket of infection may develop. This is called an abscess. In most cases, a surgeon drains the abscess by placing a tube through the abdominal wall into the abscess.

• #107 Appendicitis – Wikipedia

  https://en.wikipedia.org/wiki/Appendicitis

  The treatment begins by keeping the person who will be having surgery from eating or drinking for a given period, usually overnight. […] Antibiotics given intravenously such as cefuroxime and metronidazole may be administered early to help kill bacteria and thus reduce the spread of infection in the abdomen and postoperative complications in the abdomen or wound. […] The possibility of peritonitis is the reason why acute appendicitis warrants rapid evaluation and treatment. […] Typical acute appendicitis responds quickly to appendectomy and occasionally will resolve spontaneously. […] Mortality and severe complications are unusual but do occur, especially if peritonitis persists and is untreated.

• #108 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Ultrasonography, computed tomography, and magnetic resonance imaging are options for the evaluation of patients with suspected acute appendicitis. […] The use of clinical decision rules in conjunction with ultrasonography reduces the use of CT in the evaluation of suspected appendicitis. […] Appendectomy, via open laparotomy through a limited right lower quadrant incision or via laparoscopy, is the standard treatment for acute appendicitis. […] Emerging evidence suggests that antibiotic therapy may be considered a first-line and possibly sole therapy in selected patients with uncomplicated appendicitis. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #109 Appendicitis – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/appendicitis/symptoms-causes/syc-20369543

  The appendix is a narrow, finger-shaped pouch that sticks out from the colon. Appendicitis occurs when the appendix becomes inflamed and filled with pus. […] Appendicitis is an inflammation of the appendix. […] Treatment of appendicitis is usually antibiotics and, in most instances, surgery to remove the appendix. […] Make an appointment with a healthcare professional if you or your child has symptoms. Terrible belly pain requires immediate medical attention. […] A blockage in the lining of the appendix, called the lumen, is the likely cause of appendicitis. This blockage can cause an infection. […] Appendicitis may cause serious complications, such as a burst appendix. A burst appendix, also called ruptured appendix, spreads infection throughout the abdomen, a condition called peritonitis. […] If the appendix bursts, a pocket of infection may develop. This is called an abscess. In most cases, a surgeon drains the abscess by placing a tube through the abdominal wall into the abscess.

• #110 Diagnosis and treatment of acute appendicitis: 2020 update of the WSES Jerusalem guidelines | World Journal of Emergency Surgery | Full Text

  https://wjes.biomedcentral.com/articles/10.1186/s13017-020-00306-3

  Acute appendicitis (AA) is among the most common causes of acute abdominal pain. Diagnosis of AA is still challenging and some controversies on its management are still present among different settings and practice patterns worldwide. […] The clinical diagnosis of AA is often challenging and involves a synthesis of clinical, laboratory, and radiological findings. The diagnostic workup could be improved by using clinical scoring systems that involve physical examination findings and inflammatory markers. […] The most common postoperative complications, such as wound infection, intra-abdominal abscess, and ileus, vary in frequency between OA (overall complication rate of 11.1%) and LA (8.7%). […] The Alvarado score is not sufficiently specific in diagnosing acute appendicitis in adults, seems unreliable in differentiating complicated from uncomplicated acute appendicitis in elderly patients, and is less sensitive in patients with HIV.

• #111 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  More importantly, imaging studies of patients with an uncertain diagnosis may reduce the rate of perforation, and thus reduce morbidity, mortality, and postoperative hospital stays. […] The accuracy of CT relies in part on its ability to reveal a normal appendix better than ultrasonography. An inflamed appendix revealed on a CT scan is larger than 6 mm in diameter, and has appendiceal wall thickening and wall enhancement after contrast media infusion. […] The optimal imaging technique for acute appendicitis should have several key characteristics. It must be accurate, quick, safe, technically nonchallenging, readily available, cost efficient, and capable of being performed with little risk or discomfort for the patient. Imaging procedures, specifically ultrasonography and CT, seem to hold great promise, especially when used in clinically equivocal cases. […] However, the routine use of ultrasonography and CT in the diagnosis of appendicitis in all patients is not well established.

• #112 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  More importantly, imaging studies of patients with an uncertain diagnosis may reduce the rate of perforation, and thus reduce morbidity, mortality, and postoperative hospital stays. […] The accuracy of CT relies in part on its ability to reveal a normal appendix better than ultrasonography. An inflamed appendix revealed on a CT scan is larger than 6 mm in diameter, and has appendiceal wall thickening and wall enhancement after contrast media infusion. […] The optimal imaging technique for acute appendicitis should have several key characteristics. It must be accurate, quick, safe, technically nonchallenging, readily available, cost efficient, and capable of being performed with little risk or discomfort for the patient. Imaging procedures, specifically ultrasonography and CT, seem to hold great promise, especially when used in clinically equivocal cases. […] However, the routine use of ultrasonography and CT in the diagnosis of appendicitis in all patients is not well established.

• #113 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Ultrasonography, computed tomography, and magnetic resonance imaging are options for the evaluation of patients with suspected acute appendicitis. […] The use of clinical decision rules in conjunction with ultrasonography reduces the use of CT in the evaluation of suspected appendicitis. […] Appendectomy, via open laparotomy through a limited right lower quadrant incision or via laparoscopy, is the standard treatment for acute appendicitis. […] Emerging evidence suggests that antibiotic therapy may be considered a first-line and possibly sole therapy in selected patients with uncomplicated appendicitis. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #114 Appendicitis: An early diagnosis reduces disease severity and complications. | Bangkok Hospital Headquarter

  https://www.bangkokhospital.com/en/content/appendicitis-treatment

  Appendicitis: An early diagnosis reduces disease severity and complications. […] Early diagnosis with full physical examinations substantially helps to provide effective treatments which reduce disease severity and possible complications. […] If abdominal pain lasts longer than 6 hours, immediate medical attention must be provided. Tests and procedures used to diagnose appendicitis include: Taking a medical history of signs and symptoms and examining the abdomen including abdominal rigidity and a tendency. […] Blood tests (CBC: complete blood count) for checking the level of white blood cell count. Higher level may indicate an infection. […] Imaging tests such as abdominal ultrasound, computerized tomography (CT) scan or magnetic resonance imaging (MRI) to help confirm appendicitis or find other causes of abdominal pain. […] If appendicitis is suspected particularly with abdominal pain that shifts to lower right abdomen, immediate medical care is highly advised.

• #115 Diagnosis of Right Lower Quadrant Pain and Suspected Acute Appendicitis | Effective Health Care (EHC) Program

  https://effectivehealthcare.ahrq.gov/products/appendicitis/research-protocol

  Finally, diagnostic laparoscopy is also used for the evaluation of patients with RLQ pain/ suspected acute appendicitis. Although diagnostic laparoscopy is generally considered safe, studies have reported variable rates of morbidity and mortality from the procedure. […] As with all diagnostic tests, the modalities used in the diagnostic investigation of patients with RLQ pain/suspected appendicitis affect clinical outcomes indirectly, through their impact on clinicians diagnostic thinking and therapeutic decisionmaking. More accurate and timely diagnosis of appendicitis can minimize the time to the indicated intervention (surgery), thus reducing pain and improving clinical outcomes (e.g., reducing bowel perforation and associated infectious complications). Conversely, time-consuming or unnecessary imaging (or other diagnostic workup) may delay the indicated treatment and increase the risk of complications or result in false positive results and more negative appendectomies.

• #116 Acute Appendicitis: Efficient Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2018/0701/p25.html

  Ultrasonography, computed tomography, and magnetic resonance imaging are options for the evaluation of patients with suspected acute appendicitis. […] The use of clinical decision rules in conjunction with ultrasonography reduces the use of CT in the evaluation of suspected appendicitis. […] Appendectomy, via open laparotomy through a limited right lower quadrant incision or via laparoscopy, is the standard treatment for acute appendicitis. […] Emerging evidence suggests that antibiotic therapy may be considered a first-line and possibly sole therapy in selected patients with uncomplicated appendicitis. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #117 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  Acute appendicitis is the most common reason for emergency abdominal surgery and must be distinguished from other causes of abdominal pain. Family physicians play a valuable role in the early diagnosis and management of this condition. However, the overall diagnostic accuracy achieved by traditional history, physical examination, and laboratory tests has been approximately 80 percent. […] If the diagnosis of acute appendicitis is clear from the history and physical examination, prompt surgical referral is warranted. In atypical cases, ultrasonography and computed tomography (CT) may help lower the rate of false-negative appendicitis diagnoses, reduce morbidity from perforation, and lower hospital expenses. […] The diagnosis of appendicitis traditionally has been based on clinical features found primarily in the patients history and physical examination.

• #118 Appendicitis – symptoms, treatments and causes | healthdirect

  https://www.healthdirect.gov.au/appendicitis

  Appendicitis is diagnosed by asking about your symptoms, examining you and sometimes with imaging tests. […] It can be difficult to diagnose appendicitis, especially in young children. Even in adults, it can be hard to tell the difference between appendicitis and other medical problems that affect your abdomen. Your doctor may monitor how your condition progresses over time to help them decide on the most likely diagnosis. […] Sometimes, tests such as ultrasound, CT scan and blood tests can help your doctor diagnose appendicitis. In some cases, your doctor may recommend an operation to check the appendix even if they are not certain it is inflamed. […] Because appendicitis may be life-threatening if left untreated. In some cases, your doctor may not want to take a risk of missing a problem, and may recommend you have surgery to remove the appendix, even if there is no firm diagnosis.

• #119 Acute Appendicitis – Clinical Features – Management – TeachMeSurgery

  https://teachmesurgery.com/general/large-bowel/appendicitis/

  The current definitive treatment for appendicitis is laparoscopic appendicectomy. In certain cases, a non-surgical conservative approach may be trialled with antibiotics alone, such as in high-risk surgical candidate with uncomplicated appendicitis. However, whilst primary antibiotic treatment for simple inflamed appendix may be successful, it has a failure rate of 25-30% at one year. Indeed, a Cochrane analysis found that appendicectomy should remain the standard treatment for acute appendicitis. […] Acute appendicitis refers to inflammation of the appendix. Patients often present with pain migrating from the central to right iliac fossa region. In adults, diagnosis is often confirmed with ultrasound or CT imaging. Management is typically with laparoscopic appendicectomy, however some cases can be treated conservatively with antibiotics alone.

• #120 Clinical Approach in the Diagnosis of Acute Appendicitis | IntechOpen

  https://www.intechopen.com/chapters/61365

  Right lower quadrant tenderness is the most common clinical sign which occurs in a great majority of patients with acute appendicitis. […] The diagnosis of acute appendicitis during pregnancy remains based in upon the combination of history, physical examination, laboratory results, and ultrasonography. […] Diagnosis of acute appendicitis is basically made on clinical grounds where the experience and common sense of the physician are extremely important. The main purpose of this approach is to make a timely and accurate diagnosis within the first 24 hours after the initiation of symptoms in order to prevent serious complications such as gangrene and perforation of the appendix.

• #121 Appendicitis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK493193/

  The laboratory evaluation of patients with suspected acute appendicitis should include a total leukocyte count with differential and serum C-reactive protein (CRP) levels. The white blood cell (WBC) count and CRP concentration have a positive predictive value when used together to differentiate between uncomplicated and complicated appendicitis. […] A combination of a normal WBC count and a normal CRP value has a high negative predictive value for acute appendicitis. Increasing CRP and WBC levels significantly increases the likelihood of complicated appendicitis. […] Appendicitis is primarily diagnosed based on clinical evaluation and examination. However, imaging modalities such as computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) may be used to improve the specificity of the presumptive diagnosis. […] CT is the preferred imaging modality in patients with suspected acute appendicitis. Ultrasound is less sensitive and specific than CT for diagnosing appendicitis. However, US is useful in evaluating populations where the avoidance of ionizing radiation is preferred, such as children and pregnant patients.

• #122 Diagnosis and treatment of acute appendicitis: 2020 update of the WSES Jerusalem guidelines | World Journal of Emergency Surgery | Full Text

  https://wjes.biomedcentral.com/articles/10.1186/s13017-020-00306-3

  Acute appendicitis (AA) is among the most common causes of acute abdominal pain. Diagnosis of AA is still challenging and some controversies on its management are still present among different settings and practice patterns worldwide. […] The clinical diagnosis of AA is often challenging and involves a synthesis of clinical, laboratory, and radiological findings. The diagnostic workup could be improved by using clinical scoring systems that involve physical examination findings and inflammatory markers. […] The most common postoperative complications, such as wound infection, intra-abdominal abscess, and ileus, vary in frequency between OA (overall complication rate of 11.1%) and LA (8.7%). […] The Alvarado score is not sufficiently specific in diagnosing acute appendicitis in adults, seems unreliable in differentiating complicated from uncomplicated acute appendicitis in elderly patients, and is less sensitive in patients with HIV.

• #123

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  Ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) have high diagnostic accuracy in the diagnosis of acute appendicitis. Nowadays imaging is part of the diagnostic algorithm of appendicitis and the advantages are demonstrated by the reduced negative appendectomies rates. US is the preferred first line imaging in acute appendicitis. […] The Acute Appendicitis (AA) diagnosis is assessed by combining clinical scores, laboratory data and imaging results. […] Imaging significantly reduces the rate of negative appendicectomies in case of suspected AA. Ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) are highly accurate for the diagnosis of AA, but according to the WSES Jerusalem guidelines (2020), US examination should be the first-line imaging.

• #124

  https://link.springer.com/article/10.1007/s44326-024-00002-5

  A multidisciplinary approach involving clinical assessment, scoring systems, and appropriate imaging is essential for accurate diagnosis and optimal patient care in suspected acute appendicitis. Each component of this approach contributes to overall diagnostic accuracy and helps healthcare professionals for the correct management. […] The US should be the first imaging modality to approach patients with suspected appendicitis, but the non-visualization or non-complete visualization of the appendix do not exclude appendicitis. Furthermore, there are different scenarios that require a second line imaging: when the appendix is non visualized, when there are too many inflammatory changes or parietal thickening of cecum and ileum, and when the inflammatory process is extremely severe determining the chaos in the RLQ.

• #125 Imaging for Suspected Appendicitis | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0101/p71.html

  Acute appendicitis is the most common reason for emergency abdominal surgery and must be distinguished from other causes of abdominal pain. Family physicians play a valuable role in the early diagnosis and management of this condition. However, the overall diagnostic accuracy achieved by traditional history, physical examination, and laboratory tests has been approximately 80 percent. […] If the diagnosis of acute appendicitis is clear from the history and physical examination, prompt surgical referral is warranted. In atypical cases, ultrasonography and computed tomography (CT) may help lower the rate of false-negative appendicitis diagnoses, reduce morbidity from perforation, and lower hospital expenses. […] The diagnosis of appendicitis traditionally has been based on clinical features found primarily in the patients history and physical examination.

• #126 Appendicitis: An early diagnosis reduces disease severity and complications. | Bangkok Hospital Headquarter

  https://www.bangkokhospital.com/en/content/appendicitis-treatment

  Appendicitis: An early diagnosis reduces disease severity and complications. […] Early diagnosis with full physical examinations substantially helps to provide effective treatments which reduce disease severity and possible complications. […] If abdominal pain lasts longer than 6 hours, immediate medical attention must be provided. Tests and procedures used to diagnose appendicitis include: Taking a medical history of signs and symptoms and examining the abdomen including abdominal rigidity and a tendency. […] Blood tests (CBC: complete blood count) for checking the level of white blood cell count. Higher level may indicate an infection. […] Imaging tests such as abdominal ultrasound, computerized tomography (CT) scan or magnetic resonance imaging (MRI) to help confirm appendicitis or find other causes of abdominal pain. […] If appendicitis is suspected particularly with abdominal pain that shifts to lower right abdomen, immediate medical care is highly advised.

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