Materiały źródłowe

• #1 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. […] Appendicitis is thought to be caused by luminal obstruction from various etiologies, leading to increased mucus production and bacterial overgrowth, resulting in wall tension and, eventually, necrosis and potential perforation. […] In a study of 375 children, risk factors for appendiceal perforation included fever, vomiting, longer duration of symptoms, elevated C-reactive protein level or white blood cell count, and ultrasound findings of free abdominal fluid, visualized perforation, or a mean appendix diameter of 11 mm or more. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Patient-related risk factors for perforation include older age, three or more comorbid conditions, and male sex. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #2 Appendicitis: Causes, symptoms and treatment | Live Science

  https://www.livescience.com/appendicitis-causes-symptoms-and-treatment

  Appendicitis is fairly common: 8.6% of the male population and 6.7% of the female population will have the condition at some point in their lives. […] While a family history of appendicitis may be a risk factor for male patients, who have a slightly higher overall risk of the condition than female patients do, the only reliable predictor of risk for everyone is age. Appendicitis is most common between the ages of 10 and 20, and then there is another, smaller peak in older people that arises in the early 40s, peaks around age 65 and then gradually decreases again. […] Also, since chronic appendicitis is characterized by waxing and waning episodes, and since any such episode can potentially become acute, people who suffer from chronic appendicitis are also at risk for acute appendicitis.

• #3 Appendicitis – Symptoms and causes – Mayo Clinic

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

  A blockage in the lining of the appendix, called the lumen, is the likely cause of appendicitis. This blockage can cause an infection. The bacteria then multiply quickly, causing the appendix to become inflamed, swollen and filled with pus. If not treated right away, the appendix may burst or break open. […] Although anyone can develop appendicitis, most often it happens in people between the ages of 10 and 30.

• #4 Appendicitis

  https://www.nhs.uk/conditions/appendicitis/

  Appendicitis happens when your appendix becomes infected and swollen. This is often caused by something getting stuck in your appendix, such as a small piece of undigested food or hard poo. […] Appendicitis is common. It can happen at any age, but it’s most common in children over 10 years old and young adults. It’s rare in babies under 12 months old.

• #5 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #6 Appendicitis – Wikipedia

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

  Appendicitis is primarily caused by a blockage of the hollow portion in the appendix. This blockage typically results from a faecolith, a calcified „stone” made of feces. Some studies show a correlation between appendicoliths and disease severity. Other factors such as inflamed lymphoid tissue from a viral infection, intestinal parasites, gallstone, or tumors may also lead to this blockage. When the appendix becomes blocked, it experiences increased pressure, reduced blood flow, and bacterial growth, resulting in inflammation. This combination of factors causes tissue injury and, ultimately, tissue death. If this process is left untreated, it can lead to the appendix rupturing, which releases bacteria into the abdominal cavity, potentially leading to severe complications. […] Acute appendicitis seems to be the result of a primary obstruction of the appendix. Once this obstruction occurs, the appendix becomes filled with mucus and swells. This continued production of mucus leads to increased pressures within the lumen and the walls of the appendix. The increased pressure results in thrombosis and occlusion of the small vessels, and stasis of lymphatic flow. At this point, spontaneous recovery rarely occurs. As the occlusion of blood vessels progresses, the appendix becomes ischemic and then necrotic. As bacteria begin to leak out through the dying walls, pus forms within and around the appendix (suppuration). The result is appendiceal rupture (a 'burst appendix’) causing peritonitis, which may lead to sepsis and in rare cases, death. These events are responsible for the slowly evolving abdominal pain and other commonly associated symptoms.

• #7 Appendicitis – Wikipedia

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

  Appendicitis is primarily caused by a blockage of the hollow portion in the appendix. This blockage typically results from a faecolith, a calcified „stone” made of feces. Some studies show a correlation between appendicoliths and disease severity. Other factors such as inflamed lymphoid tissue from a viral infection, intestinal parasites, gallstone, or tumors may also lead to this blockage. When the appendix becomes blocked, it experiences increased pressure, reduced blood flow, and bacterial growth, resulting in inflammation. This combination of factors causes tissue injury and, ultimately, tissue death. If this process is left untreated, it can lead to the appendix rupturing, which releases bacteria into the abdominal cavity, potentially leading to severe complications. […] Acute appendicitis seems to be the result of a primary obstruction of the appendix. Once this obstruction occurs, the appendix becomes filled with mucus and swells. This continued production of mucus leads to increased pressures within the lumen and the walls of the appendix. The increased pressure results in thrombosis and occlusion of the small vessels, and stasis of lymphatic flow. At this point, spontaneous recovery rarely occurs. As the occlusion of blood vessels progresses, the appendix becomes ischemic and then necrotic. As bacteria begin to leak out through the dying walls, pus forms within and around the appendix (suppuration). The result is appendiceal rupture (a 'burst appendix’) causing peritonitis, which may lead to sepsis and in rare cases, death. These events are responsible for the slowly evolving abdominal pain and other commonly associated symptoms.

• #8 Appendicitis – Wikipedia

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

  Appendicitis is primarily caused by a blockage of the hollow portion in the appendix. This blockage typically results from a faecolith, a calcified „stone” made of feces. Some studies show a correlation between appendicoliths and disease severity. Other factors such as inflamed lymphoid tissue from a viral infection, intestinal parasites, gallstone, or tumors may also lead to this blockage. When the appendix becomes blocked, it experiences increased pressure, reduced blood flow, and bacterial growth, resulting in inflammation. This combination of factors causes tissue injury and, ultimately, tissue death. If this process is left untreated, it can lead to the appendix rupturing, which releases bacteria into the abdominal cavity, potentially leading to severe complications. […] Acute appendicitis seems to be the result of a primary obstruction of the appendix. Once this obstruction occurs, the appendix becomes filled with mucus and swells. This continued production of mucus leads to increased pressures within the lumen and the walls of the appendix. The increased pressure results in thrombosis and occlusion of the small vessels, and stasis of lymphatic flow. At this point, spontaneous recovery rarely occurs. As the occlusion of blood vessels progresses, the appendix becomes ischemic and then necrotic. As bacteria begin to leak out through the dying walls, pus forms within and around the appendix (suppuration). The result is appendiceal rupture (a 'burst appendix’) causing peritonitis, which may lead to sepsis and in rare cases, death. These events are responsible for the slowly evolving abdominal pain and other commonly associated symptoms.

• #9 Appendicitis – Wikipedia

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

  Appendicitis is primarily caused by a blockage of the hollow portion in the appendix. This blockage typically results from a faecolith, a calcified „stone” made of feces. Some studies show a correlation between appendicoliths and disease severity. Other factors such as inflamed lymphoid tissue from a viral infection, intestinal parasites, gallstone, or tumors may also lead to this blockage. When the appendix becomes blocked, it experiences increased pressure, reduced blood flow, and bacterial growth, resulting in inflammation. This combination of factors causes tissue injury and, ultimately, tissue death. If this process is left untreated, it can lead to the appendix rupturing, which releases bacteria into the abdominal cavity, potentially leading to severe complications. […] Acute appendicitis seems to be the result of a primary obstruction of the appendix. Once this obstruction occurs, the appendix becomes filled with mucus and swells. This continued production of mucus leads to increased pressures within the lumen and the walls of the appendix. The increased pressure results in thrombosis and occlusion of the small vessels, and stasis of lymphatic flow. At this point, spontaneous recovery rarely occurs. As the occlusion of blood vessels progresses, the appendix becomes ischemic and then necrotic. As bacteria begin to leak out through the dying walls, pus forms within and around the appendix (suppuration). The result is appendiceal rupture (a 'burst appendix’) causing peritonitis, which may lead to sepsis and in rare cases, death. These events are responsible for the slowly evolving abdominal pain and other commonly associated symptoms.

• #10 Appendicitis – Digestive Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/digestive-disorders/gastrointestinal-emergencies/appendicitis

  Appendicitis is inflammation and infection of the appendix. […] Often a blockage inside the appendix causes the appendix to become inflamed and infected. […] The cause of appendicitis is not fully understood. However, in most cases, a blockage inside the appendix probably starts a process. The blockage may be from a small, hard piece of stool (fecalith), a foreign body, tumor, or, rarely, even worms. As a result of the blockage, the appendix becomes inflamed and infected. […] A ruptured appendix may cause a pus-filled pocket of infection (abscess) to form. […] Without surgery or antibiotics (as might occur in a person in a remote location without access to modern medical care), appendicitis is fatal in many people.

• #11 Appendicitis Causes, Symptoms, and Treatments | UPMC

  https://www.upmc.com/services/digestive-disorders-center/conditions-we-treat/appendicitis

  A germ causes an appendix infection, mostly bacterial but sometimes a virus, parasite, or fungus. These germs grow and expand inside the appendix when the opening of it gets blocked. […] Appendicitis often occurs in otherwise healthy people. Most times, there isn’t a prime reason or cause for it. […] Research shows that people who have a diet low in fiber are more likely to get appendicitis. While a high-fiber diet may reduce your risk, it doesn’t fully remove the risk of appendicitis. […] Once an infection starts in the appendix, it becomes inflamed by the immune system’s reaction. […] An inflamed appendix can burst. If doctors don’t remove the infected parts of a burst appendix and clean the abdomen, the infection can spread. […] The spreading infection, and the immune system’s response to it, can damage other organs. […] If untreated, a ruptured appendix can be fatal.

• #12 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  Appendicitis occurs when your appendix gets clogged, infected and inflamed. The size and location of your appendix make it easy for it to become clogged and infected, causing appendicitis. Poop (feces) moving through your large intestine can block or infect your appendix, leading to inflammation. Common causes of inflammation, swelling, obstruction and infection in your appendix include: Hardened poop (appendix stones). Hard, calcified fecal deposits known as fecaliths, appendicoliths or appendix stones can get stuck in the opening to your appendix. They carry bacteria and can also trap bacteria that was already there inside your appendix. Lymphoid hyperplasia. Your lymphatic system, which is part of your immune system, helps fight infections by producing and releasing white blood cells into your tissues. This can cause the lymphoid tissue in your appendix to swell, even when the original infection is elsewhere in your body. The swollen tissue in your appendix can obstruct it and lead to infection inside. Colitis. Inflammation in your colon from an infection or inflammatory bowel disease can affect your appendix. The infection may spread, or the inflammation itself may irritate it.

• #13 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #14 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  Appendicitis occurs when your appendix gets clogged, infected and inflamed. The size and location of your appendix make it easy for it to become clogged and infected, causing appendicitis. Poop (feces) moving through your large intestine can block or infect your appendix, leading to inflammation. Common causes of inflammation, swelling, obstruction and infection in your appendix include: Hardened poop (appendix stones). Hard, calcified fecal deposits known as fecaliths, appendicoliths or appendix stones can get stuck in the opening to your appendix. They carry bacteria and can also trap bacteria that was already there inside your appendix. Lymphoid hyperplasia. Your lymphatic system, which is part of your immune system, helps fight infections by producing and releasing white blood cells into your tissues. This can cause the lymphoid tissue in your appendix to swell, even when the original infection is elsewhere in your body. The swollen tissue in your appendix can obstruct it and lead to infection inside. Colitis. Inflammation in your colon from an infection or inflammatory bowel disease can affect your appendix. The infection may spread, or the inflammation itself may irritate it.

• #15 Appendicitis | Inflammation of Appendix, Acute Abdominal Pain & Surgery | Britannica

  https://www.britannica.com/science/appendicitis

  appendicitis, inflammation of the appendix, the closed-end tube attached to the cecum, the first region of the large intestine. […] The main factor that seems to precipitate a bout of appendicitis is obstruction of the appendix. Obstruction may arise from blockage by a hard mass of fecal matter (a fecal stone), by infection with parasites, or by the presence of a foreign object. Lymphoid hyperplasia, a rapid increase in the production of white blood cells known as lymphocytes, which may be associated with viral illness, can also cause obstruction. Excessive consumption of alcohol may exacerbate a case of appendicitis. […] Doctors try to establish whether a patient may have appendicitis by measuring the number of white blood cells (leukocytes), which often increase from the normal count of between 5,000 and 10,000 (for an adult) to an abnormal count of between 12,000 and 20,000.

• #16 Appendicitis: Early Symptoms, Causes, Pain Location, Surgery, Recovery

  https://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis

  Appendicitis happens when the appendix gets blocked, often by poop, a foreign body (something inside you that isnt supposed to be there), or cancer. Blockage may also result from infection since the appendix can swell in response to any infection in the body. […] Certain conditions can also cause appendicitis, including: Appendix stones. Old poop can dry up and turn into hard stones that then get stuck in the opening of your appendix. Since these stones carry bacteria and can also trap other bacteria inside your appendix, theyre likely to cause inflammation. […] Lymphoid hyperplasia. Your lymphatic system is the part of your immune system that helps your body regulate fluids, filter out bacteria, and create white blood cells. In the case of lymphoid hyperplasia, your lymph nodes start to produce extra cells in response to a virus or infection. Since your appendix has lymphatic tissue, it might react by swelling even if its not the source of the infection. That swelling can cause an obstruction that leads to an infection.

• #17 Appendicitis – Wikipedia

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

  The causative agents include bezoars, foreign bodies, trauma, lymphadenitis and, most commonly, calcified fecal deposits that are known as appendicoliths or fecaliths. The occurrence of obstructing fecaliths has attracted attention since their presence in people with appendicitis is higher in developed than in developing countries. In addition, an appendiceal fecalith is commonly associated with complicated appendicitis. Fecal stasis and arrest may play a role, as demonstrated by people with acute appendicitis having fewer bowel movements per week compared with healthy controls. […] Several studies offer evidence that a low fiber intake is involved in the pathogenesis of appendicitis. This low intake of dietary fiber is in accordance with the occurrence of a right-sided fecal reservoir and the fact that dietary fiber reduces transit time.

• #18 Appendicitis – StatPearls – NCBI Bookshelf

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

  In the pediatric population, acute appendicitis is most commonly caused by lymphoid hyperplasia. This condition involves an overgrowth of lymphoid tissue in the appendix, leading to inflammation and localized ischemia. This inflammatory process increases the risk of appendiceal perforation, the formation of contained periappendiceal abscess, and subsequent peritonitis. […] In adults, acute appendicitis is commonly attributed to various causes, including infections, fecaliths, or tumors. Tumors associated with acute appendicitis in adults include appendiceal adenocarcinoma, mucocele, and carcinoid tumor.

• #19 Appendicitis: Early Symptoms, Causes, Pain Location, Surgery, Recovery

  https://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis

  Appendicitis happens when the appendix gets blocked, often by poop, a foreign body (something inside you that isnt supposed to be there), or cancer. Blockage may also result from infection since the appendix can swell in response to any infection in the body. […] Certain conditions can also cause appendicitis, including: Appendix stones. Old poop can dry up and turn into hard stones that then get stuck in the opening of your appendix. Since these stones carry bacteria and can also trap other bacteria inside your appendix, theyre likely to cause inflammation. […] Lymphoid hyperplasia. Your lymphatic system is the part of your immune system that helps your body regulate fluids, filter out bacteria, and create white blood cells. In the case of lymphoid hyperplasia, your lymph nodes start to produce extra cells in response to a virus or infection. Since your appendix has lymphatic tissue, it might react by swelling even if its not the source of the infection. That swelling can cause an obstruction that leads to an infection.

• #20 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #21 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #22 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #23 Appendicitis: Practice Essentials, Background, Anatomy

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

  Appendicitis is caused by obstruction of the appendiceal lumen. The most common causes of luminal obstruction include lymphoid hyperplasia secondary to inflammatory bowel disease (IBD) or infections (more common during childhood and in young adults), fecal stasis and fecaliths (more common in elderly patients), parasites (especially in Eastern countries), or, more rarely, foreign bodies and neoplasms. […] Obstruction of the appendiceal lumen has less commonly been associated with bacteria (Yersinia species, adenovirus, cytomegalovirus, actinomycosis, Mycobacteria species, Histoplasma species), parasites (eg, Schistosomes species, pinworms, Strongyloides stercoralis), foreign material (eg, shotgun pellet, intrauterine device, tongue stud, activated charcoal), tuberculosis, and tumors.

• #24 Appendicitis: Practice Essentials, Background, Anatomy

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

  Appendicitis is caused by obstruction of the appendiceal lumen. The most common causes of luminal obstruction include lymphoid hyperplasia secondary to inflammatory bowel disease (IBD) or infections (more common during childhood and in young adults), fecal stasis and fecaliths (more common in elderly patients), parasites (especially in Eastern countries), or, more rarely, foreign bodies and neoplasms. […] Obstruction of the appendiceal lumen has less commonly been associated with bacteria (Yersinia species, adenovirus, cytomegalovirus, actinomycosis, Mycobacteria species, Histoplasma species), parasites (eg, Schistosomes species, pinworms, Strongyloides stercoralis), foreign material (eg, shotgun pellet, intrauterine device, tongue stud, activated charcoal), tuberculosis, and tumors.

• #25 Appendicitis Symptoms, Treatment, Surgery, Diagnosis

  https://www.emedicinehealth.com/appendicitis/article_em.htm

  There is no clear cause of appendicitis. Fecal material is thought to be one possible cause of obstruction of the appendix. Bacteria, viruses, fungi, and parasites can result in infection, leading to the swelling of the tissues of the appendix wall. The various infecting organisms include Yersinia species, adenovirus, cytomegalovirus, actinomycosis, Mycobacteria species, Histoplasma species, Schistosoma species, pinworms, and Strongyloides stercoralis. Swelling of the tissue from inflammatory bowel disease such as Crohn’s disease also may cause appendicitis. […] Appendicitis is not a hereditary disease and is not transmittable from person to person. […] There are no proven risk factors for appendicitis. It has been suggested that potential risk factors may include a diet low in fiber and high in sugar, family history, and infection.

• #26 Appendicitis – StatPearls – NCBI Bookshelf

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

  In the pediatric population, acute appendicitis is most commonly caused by lymphoid hyperplasia. This condition involves an overgrowth of lymphoid tissue in the appendix, leading to inflammation and localized ischemia. This inflammatory process increases the risk of appendiceal perforation, the formation of contained periappendiceal abscess, and subsequent peritonitis. […] In adults, acute appendicitis is commonly attributed to various causes, including infections, fecaliths, or tumors. Tumors associated with acute appendicitis in adults include appendiceal adenocarcinoma, mucocele, and carcinoid tumor.

• #27 Appendicitis – StatPearls – NCBI Bookshelf

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

  In the pediatric population, acute appendicitis is most commonly caused by lymphoid hyperplasia. This condition involves an overgrowth of lymphoid tissue in the appendix, leading to inflammation and localized ischemia. This inflammatory process increases the risk of appendiceal perforation, the formation of contained periappendiceal abscess, and subsequent peritonitis. […] In adults, acute appendicitis is commonly attributed to various causes, including infections, fecaliths, or tumors. Tumors associated with acute appendicitis in adults include appendiceal adenocarcinoma, mucocele, and carcinoid tumor.

• #28 Appendicitis: Early Symptoms, Causes, Pain Location, Surgery, Recovery

  https://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis

  Colitis. If your large intestine is inflamed, it could affect your appendix either through the spread of an infection or because of irritation. […] Tumors. While rare, tumors can grow inside of your appendix, leading to appendicitis. […] Parasites. If a parasite blocks or partially blocks the opening of the appendix, it can become inflamed. […] Cystic fibrosis. Some people with cystic fibrosis have a larger appendix, which may increase their risk of appendicitis.

• #29 What Is the Main Cause of Appendicitis?

  https://www.medicinenet.com/what_is_the_main_cause_of_appendicitis/article.htm

  The cause of appendicitis is not always clear, but it’s usually related to viral or bacterial infections, large intestine blockages, inflammatory bowel disease, abdominal trauma, and benign or malignant tumors. […] Infection is one of the most common causes of appendicitis. A viral or bacterial infection causes the appendix to swell and fill with pus. The inflammation blocks blood flow to the appendix, which then starts to die. […] Sometimes appendicitis can be caused by fecal blockage of the large intestine. Normally, the appendix is open to the large intestine. When stool or bacteria from an infection enters the appendix, the tube joining the appendix to the large intestine becomes blocked. This blockage leads to inflammation and swelling. […] Rarely, appendicitis can be caused by tumors, both benign (noncancerous) and malignant (cancerous). These tumors are usually discovered when the appendix is removed because of appendicitis or during diagnostic tests for other issues.

• #30 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  Sometimes bacterial, viral, or parasitic infections in the digestive tract or other abdominal organs can spread to the appendix. When this occurs, the infection in the appendix causes inflammation and swelling. […] Benign growths, such as polyps, and malignant (cancerous) tumors in the appendix, large intestine, or ileocecum (where the small intestine meets the large intestine) can cause irritation or blockage in the appendix, leading to appendicitis. […] Inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn’s disease, causes chronic inflammation in the gastrointestinal tract. Inflammation associated with IBD can affect the appendix, increasing your risk of appendicitis. […] Trauma or injury to the abdomen is a rare cause of appendicitis. […] Foreign bodies, such as fruit seeds or swallowed non-food items, can sometimes block the opening of the appendix.

• #31 Appendicitis: Early Symptoms, Causes, Pain Location, Surgery, Recovery

  https://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis

  Colitis. If your large intestine is inflamed, it could affect your appendix either through the spread of an infection or because of irritation. […] Tumors. While rare, tumors can grow inside of your appendix, leading to appendicitis. […] Parasites. If a parasite blocks or partially blocks the opening of the appendix, it can become inflamed. […] Cystic fibrosis. Some people with cystic fibrosis have a larger appendix, which may increase their risk of appendicitis.

• #32 Appendicitis: Symptoms, Types, Causes, and Treatment Options

  https://www.maxhealthcare.in/blogs/all-about-appendicitis

  Although rare, foreign objects accidentally ingested may become lodged in the appendix, causing blockages and increasing the risk of appendicitis. […] Infections, particularly those affecting the gastrointestinal system, can lead to the swelling of appendix tissues, ultimately elevating the risk of appendicitis. […] Though infrequent, the presence of tumours within the appendix can cause appendicitis. This risk factor underscores the importance of early diagnosis and treatment. […] Various factors, including obstructions in the appendix or nearby structures, can raise the likelihood of developing appendicitis. Identifying and addressing these obstructions is essential in preventing the condition.

• #33 Chronic Appendicitis: Symptoms, Causes, and More

  https://www.healthline.com/health/chronic-appendicitis

  Chronic appendicitis can have milder symptoms that last for a long time, and that disappear and reappear. […] The cause of chronic appendicitis is often unknown. Inflammation and obstruction of the appendix are sometimes the cause. […] Other possible causes of chronic appendicitis include accumulation of fecal matter, calcified fecal deposits, tumors, enlarged lymphoid follicles, worms, trauma, and accumulation of foreign objects, like stones, marbles, or pins. […] When you have an obstruction or inflammation in your appendix, it can allow bacteria to grow and multiply. In chronic appendicitis, the obstruction may be partial. […] Its not clear if you can do anything to prevent chronic appendicitis. Eating a diet rich in fiber may lower the risk of appendicitis, but research on diet, nutrition, and eating patterns for the prevention of chronic appendicitis is inconclusive.

• #34 :: PGHN :: Pediatric Gastroenterology, Hepatology & Nutrition

  https://pghn.org/DOIx.php?id=10.5223/pghn.2021.24.2.127

  In patients with acute enterocolitis, radiologic findings are sometimes accompanied by secondary inflammation of the appendix. […] Secondary appendicitis refers to inflammation of the appendix resulting from lesions in colonic or periappendiceal sites. Secondary appendicitis is classified as intrinsic or extrinsic, where intrinsic appendicitis is caused by an inflammation of the cecum or large intestine connected to the appendix (e.g., ischemic colitis, infectious colitis, pseudomembranous colitis), and extrinsic appendicitis is caused by inflammation resulting from a spread of lesion in the surrounding organs, such as the gallbladder, liver, bladder, ovaries, kidney, or terminal ileum (e.g., Crohn’s disease, cystitis, cholecystitis, sigmoid diverticulosis). […] The clinical significance of appendicitis secondary to acute enterocolitis is largely unknown.

• #35 :: PGHN :: Pediatric Gastroenterology, Hepatology & Nutrition

  https://pghn.org/DOIx.php?id=10.5223/pghn.2021.24.2.127

  In patients with acute enterocolitis, radiologic findings are sometimes accompanied by secondary inflammation of the appendix. […] Secondary appendicitis refers to inflammation of the appendix resulting from lesions in colonic or periappendiceal sites. Secondary appendicitis is classified as intrinsic or extrinsic, where intrinsic appendicitis is caused by an inflammation of the cecum or large intestine connected to the appendix (e.g., ischemic colitis, infectious colitis, pseudomembranous colitis), and extrinsic appendicitis is caused by inflammation resulting from a spread of lesion in the surrounding organs, such as the gallbladder, liver, bladder, ovaries, kidney, or terminal ileum (e.g., Crohn’s disease, cystitis, cholecystitis, sigmoid diverticulosis). […] The clinical significance of appendicitis secondary to acute enterocolitis is largely unknown.

• #36 :: PGHN :: Pediatric Gastroenterology, Hepatology & Nutrition

  https://pghn.org/DOIx.php?id=10.5223/pghn.2021.24.2.127

  Most primary appendicitis occurs as a result of a series of events resulting from a blockage in the lining of the appendix, which in turn cause closed loop obstructions with continued mucus secretion into the appendiceal lining, thereby distending it and continuously increasing the intraluminal pressure. […] By contrast, secondary appendicitis refers to periappendicitis or serositis caused by colonic or periappendiceal lesions spreading inflammation to periappendiceal areas, as opposed to a blockage of the appendiceal lumen, and this results from sympathetic mural edema. […] In the present study, many cases of appendicitis secondary to acute enterocolitis were intrinsic cases caused by acute ileocecitis affecting the ileum and cecum around the appendix. […] Of patients with secondary appendicitis, Salmonella spp., Campylobacter spp., and C. perfringens were detected in the stool samples of five patients, with no viruses detected. These findings suggest that patients with secondary appendicitis may be more likely to have been infected with bacteria, and this should be noted when determining treatment approaches.

• #37 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  Appendicitis occurs when your appendix gets clogged, infected and inflamed. The size and location of your appendix make it easy for it to become clogged and infected, causing appendicitis. Poop (feces) moving through your large intestine can block or infect your appendix, leading to inflammation. Common causes of inflammation, swelling, obstruction and infection in your appendix include: Hardened poop (appendix stones). Hard, calcified fecal deposits known as fecaliths, appendicoliths or appendix stones can get stuck in the opening to your appendix. They carry bacteria and can also trap bacteria that was already there inside your appendix. Lymphoid hyperplasia. Your lymphatic system, which is part of your immune system, helps fight infections by producing and releasing white blood cells into your tissues. This can cause the lymphoid tissue in your appendix to swell, even when the original infection is elsewhere in your body. The swollen tissue in your appendix can obstruct it and lead to infection inside. Colitis. Inflammation in your colon from an infection or inflammatory bowel disease can affect your appendix. The infection may spread, or the inflammation itself may irritate it.

• #38 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  Appendicitis occurs when your appendix gets clogged, infected and inflamed. The size and location of your appendix make it easy for it to become clogged and infected, causing appendicitis. Poop (feces) moving through your large intestine can block or infect your appendix, leading to inflammation. Common causes of inflammation, swelling, obstruction and infection in your appendix include: Hardened poop (appendix stones). Hard, calcified fecal deposits known as fecaliths, appendicoliths or appendix stones can get stuck in the opening to your appendix. They carry bacteria and can also trap bacteria that was already there inside your appendix. Lymphoid hyperplasia. Your lymphatic system, which is part of your immune system, helps fight infections by producing and releasing white blood cells into your tissues. This can cause the lymphoid tissue in your appendix to swell, even when the original infection is elsewhere in your body. The swollen tissue in your appendix can obstruct it and lead to infection inside. Colitis. Inflammation in your colon from an infection or inflammatory bowel disease can affect your appendix. The infection may spread, or the inflammation itself may irritate it.

• #39 What Is the Main Cause of Appendicitis?

  https://www.medicinenet.com/what_is_the_main_cause_of_appendicitis/article.htm

  Inflammatory bowel disease is a term that refers to inflammatory diseases of the intestines, such as Crohns disease and ulcerative colitis. This chronic inflammation can lead to inflammation of the appendix as well. […] Though its fairly infrequent, abdominal trauma can lead to appendicitis. This happens when there is a serious injury to the abdomen that causes a blockage of the appendix.

• #40 What Is the Main Cause of Appendicitis?

  https://www.medicinenet.com/what_is_the_main_cause_of_appendicitis/article.htm

  Inflammatory bowel disease is a term that refers to inflammatory diseases of the intestines, such as Crohns disease and ulcerative colitis. This chronic inflammation can lead to inflammation of the appendix as well. […] Though its fairly infrequent, abdominal trauma can lead to appendicitis. This happens when there is a serious injury to the abdomen that causes a blockage of the appendix.

• #41 Causes of a Ruptured Appendix – Dr. Tabib – Blog

  https://www.tabibmd.com/blog/causes-of-a-ruptured-appendix/

  A ruptured appendix is caused by appendicitis. Appendicitis occurs when the appendix becomes inflamed. Appendicitis occurs when the opening of the appendix that transitions into the large intestine is blocked. The blockage leads to the buildup of bacteria which can cause a serious infection. The cause of the blockage can be due to a growth or tumor in the appendix, bacteria, viruses, parasites, stool buildup, or even a foreign object. Inflammatory bowel disease is also another possible cause of appendicitis. While the exact cause of appendicitis is not completely understood, there are a number of factors that can place you at a higher risk for the condition. […] There are a number of factors that can increase your risk for appendicitis. […] An inflammatory bowel disease (IBD) diagnosis can increase inflammation in your abdomen. This can weaken the walls of your appendix and potentially lead to an infection and appendicitis.

• #42 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  The causes of chronic appendicitis are not well understood. The leading theory suggests that chronic appendicitis develops due to a partial obstruction of the appendix. […] Appendicitis is not directly inherited, but there is some evidence that genetics may play a role in its development. […] Researchers have discovered variants in certain genes that are connected to an increased risk of appendicitis. […] Your risk of developing appendicitis is about three times higher if you have a first-degree relative (parent, sibling, or child) with a history of the condition. […] Certain risk factors can increase your chances of developing appendicitis. […] A diet low in fiber and high in processed foods is associated with an increased risk of constipation and hard stools, which may lead to an appendix blockage.

• #43 Appendicitis – Symptoms, Types, Causes, Complications, Prevention Your Webpage TitlePACE Hospitals – Best Hospitals in Hitech City, Hyderabad, India | Near Madhapur, Kukatpally, KPHB, Kondapur, Gachibowli, Jubilee Hills, Banjara HillsPACE

  https://www.pacehospital.com/appendicitis-symptoms-incidence-types-causes-complications-and-prevention

  Appendicitis causes […] Some of the common causes of the appendicitis might include: […] – Obstruction of the appendiceal lumen due to an appendicolith (stone of the appendix) or some other mechanical causes or injuries […] – Diseases of the intestines […] – Infections due to viruses, bacteria, or intestinal parasites […] – Hypertrophied lymphatic tissues […] – Carcinoid tumours of the appendix, etc. […] […] […] Appendicitis risk factors […] Some of the risk factors for appendicitis include: […] – Age: Appendicitis is commonly seen in young adults in their mid-20s. However, it might occur at any age. […] – Gender: Appendicitis is more likely to be seen in men when compared to women. […] – Family history: Family history and genetic conditions like cystic fibrosis increase the risk of appendicitis due to the genetic factors accompanying them.

• #44 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  The causes of chronic appendicitis are not well understood. The leading theory suggests that chronic appendicitis develops due to a partial obstruction of the appendix. […] Appendicitis is not directly inherited, but there is some evidence that genetics may play a role in its development. […] Researchers have discovered variants in certain genes that are connected to an increased risk of appendicitis. […] Your risk of developing appendicitis is about three times higher if you have a first-degree relative (parent, sibling, or child) with a history of the condition. […] Certain risk factors can increase your chances of developing appendicitis. […] A diet low in fiber and high in processed foods is associated with an increased risk of constipation and hard stools, which may lead to an appendix blockage.

• #45 Appendicitis – Symptoms, Types, Causes, Complications, Prevention Your Webpage TitlePACE Hospitals – Best Hospitals in Hitech City, Hyderabad, India | Near Madhapur, Kukatpally, KPHB, Kondapur, Gachibowli, Jubilee Hills, Banjara HillsPACE

  https://www.pacehospital.com/appendicitis-symptoms-incidence-types-causes-complications-and-prevention

  – Trauma or injuries: Trauma causes mechanical injuries to the appendix that might cause inflammation. […] – Tumours and cancers: Tumours such as carcinoid tumours and appendiceal adenocarcinomas increase the risk of developing appendicitis. […] – Abdominal infections: Intestinal parasites and aerobic and anaerobic bacteria build up, increasing the risk of developing appendicitis. […] – Blockage in the appendix: Obstruction due to the stone or a foreign object can lead to the infection.

• #46 Appendicitis: Early Symptoms, Causes, Pain Location, Surgery, Recovery

  https://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis

  Colitis. If your large intestine is inflamed, it could affect your appendix either through the spread of an infection or because of irritation. […] Tumors. While rare, tumors can grow inside of your appendix, leading to appendicitis. […] Parasites. If a parasite blocks or partially blocks the opening of the appendix, it can become inflamed. […] Cystic fibrosis. Some people with cystic fibrosis have a larger appendix, which may increase their risk of appendicitis.

• #47 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  The causes of chronic appendicitis are not well understood. The leading theory suggests that chronic appendicitis develops due to a partial obstruction of the appendix. […] Appendicitis is not directly inherited, but there is some evidence that genetics may play a role in its development. […] Researchers have discovered variants in certain genes that are connected to an increased risk of appendicitis. […] Your risk of developing appendicitis is about three times higher if you have a first-degree relative (parent, sibling, or child) with a history of the condition. […] Certain risk factors can increase your chances of developing appendicitis. […] A diet low in fiber and high in processed foods is associated with an increased risk of constipation and hard stools, which may lead to an appendix blockage.

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

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

  Acute appendicitis is typically caused by direct luminal obstruction, usually either secondary to a faecolith or lymphoid hyperplasia, or less commonly by a malignancy (such as a caecal adenocarcinoma or appendiceal neuroendocrine tumour) […] When obstructed, commensal bacteria in the appendix can multiply, resulting in acute inflammation. Reduced venous drainage and localised inflammation can result in increased pressure within the appendix, in turn resulting in ischaemia within the appendiceal wall. […] If left untreated, ischaemia can result in necrosis, which in turn can cause the appendix to perforate. […] Twin studies suggest that genetics account for 30% of risk. […] No specific gene has been identified specifically, but the risk is roughly three times higher in members of families with a positive history.

• #49 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  The theory of chronic appendicitis is that something causes mild inflammation on and off for a long time. It might be a chronic condition like inflammatory bowel disease or mild bacterial overgrowth. Or it might be an obstruction that moves in and out of the opening to your appendix. Chronic inflammation can lead to lymphoid hyperplasia or even scar tissue in your appendix if it lasts a very long time. […] Having a family history of appendicitis does appear to raise your risk of developing it, though its not clear why. Appendicitis itself is not inherited, but genetics might be involved in some of its causes.

• #50 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  The theory of chronic appendicitis is that something causes mild inflammation on and off for a long time. It might be a chronic condition like inflammatory bowel disease or mild bacterial overgrowth. Or it might be an obstruction that moves in and out of the opening to your appendix. Chronic inflammation can lead to lymphoid hyperplasia or even scar tissue in your appendix if it lasts a very long time. […] Having a family history of appendicitis does appear to raise your risk of developing it, though its not clear why. Appendicitis itself is not inherited, but genetics might be involved in some of its causes.

• #51 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  The causes of chronic appendicitis are not well understood. The leading theory suggests that chronic appendicitis develops due to a partial obstruction of the appendix. […] Appendicitis is not directly inherited, but there is some evidence that genetics may play a role in its development. […] Researchers have discovered variants in certain genes that are connected to an increased risk of appendicitis. […] Your risk of developing appendicitis is about three times higher if you have a first-degree relative (parent, sibling, or child) with a history of the condition. […] Certain risk factors can increase your chances of developing appendicitis. […] A diet low in fiber and high in processed foods is associated with an increased risk of constipation and hard stools, which may lead to an appendix blockage.

• #52 Chronic Appendicitis: Symptoms, Causes, and More

  https://www.healthline.com/health/chronic-appendicitis

  Chronic appendicitis can have milder symptoms that last for a long time, and that disappear and reappear. […] The cause of chronic appendicitis is often unknown. Inflammation and obstruction of the appendix are sometimes the cause. […] Other possible causes of chronic appendicitis include accumulation of fecal matter, calcified fecal deposits, tumors, enlarged lymphoid follicles, worms, trauma, and accumulation of foreign objects, like stones, marbles, or pins. […] When you have an obstruction or inflammation in your appendix, it can allow bacteria to grow and multiply. In chronic appendicitis, the obstruction may be partial. […] Its not clear if you can do anything to prevent chronic appendicitis. Eating a diet rich in fiber may lower the risk of appendicitis, but research on diet, nutrition, and eating patterns for the prevention of chronic appendicitis is inconclusive.

• #53 Chronic Appendicitis: Symptoms, Causes, and More

  https://www.healthline.com/health/chronic-appendicitis

  Chronic appendicitis can have milder symptoms that last for a long time, and that disappear and reappear. […] The cause of chronic appendicitis is often unknown. Inflammation and obstruction of the appendix are sometimes the cause. […] Other possible causes of chronic appendicitis include accumulation of fecal matter, calcified fecal deposits, tumors, enlarged lymphoid follicles, worms, trauma, and accumulation of foreign objects, like stones, marbles, or pins. […] When you have an obstruction or inflammation in your appendix, it can allow bacteria to grow and multiply. In chronic appendicitis, the obstruction may be partial. […] Its not clear if you can do anything to prevent chronic appendicitis. Eating a diet rich in fiber may lower the risk of appendicitis, but research on diet, nutrition, and eating patterns for the prevention of chronic appendicitis is inconclusive.

• #54 What doctors wish patients knew about appendicitis | American Medical Association

  https://www.ama-assn.org/delivering-care/population-care/what-doctors-wish-patients-knew-about-appendicitis

  The problem is about 20% of those patients will have a recurrence of their appendicitis sometime because whatever set them up for appendicitis to begin with is going to happen again, Dr. Fairbrother said, noting theres not a high tolerance in the United States for that knowing how simple, easy and uncomplicated the procedure for removing the appendix has become. […] The one thing I tell patients is to not delay preventative care for constipation for them or their children, Dr. Fairbrother said. Not every constipated kid will get appendicitis and same with adults. That’s not how it works. But it is associated.

• #55 Appendicitis Causes, Symptoms, and Treatments | UPMC

  https://www.upmc.com/services/digestive-disorders-center/conditions-we-treat/appendicitis

  A germ causes an appendix infection, mostly bacterial but sometimes a virus, parasite, or fungus. These germs grow and expand inside the appendix when the opening of it gets blocked. […] Appendicitis often occurs in otherwise healthy people. Most times, there isn’t a prime reason or cause for it. […] Research shows that people who have a diet low in fiber are more likely to get appendicitis. While a high-fiber diet may reduce your risk, it doesn’t fully remove the risk of appendicitis. […] Once an infection starts in the appendix, it becomes inflamed by the immune system’s reaction. […] An inflamed appendix can burst. If doctors don’t remove the infected parts of a burst appendix and clean the abdomen, the infection can spread. […] The spreading infection, and the immune system’s response to it, can damage other organs. […] If untreated, a ruptured appendix can be fatal.

• #56 Appendicitis Causes, Symptoms, and Treatments | UPMC

  https://www.upmc.com/services/digestive-disorders-center/conditions-we-treat/appendicitis

  A germ causes an appendix infection, mostly bacterial but sometimes a virus, parasite, or fungus. These germs grow and expand inside the appendix when the opening of it gets blocked. […] Appendicitis often occurs in otherwise healthy people. Most times, there isn’t a prime reason or cause for it. […] Research shows that people who have a diet low in fiber are more likely to get appendicitis. While a high-fiber diet may reduce your risk, it doesn’t fully remove the risk of appendicitis. […] Once an infection starts in the appendix, it becomes inflamed by the immune system’s reaction. […] An inflamed appendix can burst. If doctors don’t remove the infected parts of a burst appendix and clean the abdomen, the infection can spread. […] The spreading infection, and the immune system’s response to it, can damage other organs. […] If untreated, a ruptured appendix can be fatal.

• #57 Appendicitis – Wikipedia

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

  The causative agents include bezoars, foreign bodies, trauma, lymphadenitis and, most commonly, calcified fecal deposits that are known as appendicoliths or fecaliths. The occurrence of obstructing fecaliths has attracted attention since their presence in people with appendicitis is higher in developed than in developing countries. In addition, an appendiceal fecalith is commonly associated with complicated appendicitis. Fecal stasis and arrest may play a role, as demonstrated by people with acute appendicitis having fewer bowel movements per week compared with healthy controls. […] Several studies offer evidence that a low fiber intake is involved in the pathogenesis of appendicitis. This low intake of dietary fiber is in accordance with the occurrence of a right-sided fecal reservoir and the fact that dietary fiber reduces transit time.

• #58 What doctors wish patients knew about appendicitis | American Medical Association

  https://www.ama-assn.org/delivering-care/population-care/what-doctors-wish-patients-knew-about-appendicitis

  The problem is about 20% of those patients will have a recurrence of their appendicitis sometime because whatever set them up for appendicitis to begin with is going to happen again, Dr. Fairbrother said, noting theres not a high tolerance in the United States for that knowing how simple, easy and uncomplicated the procedure for removing the appendix has become. […] The one thing I tell patients is to not delay preventative care for constipation for them or their children, Dr. Fairbrother said. Not every constipated kid will get appendicitis and same with adults. That’s not how it works. But it is associated.

• #59 Appendicitis Causes, Complications, and Risk Factors

  https://www.everydayhealth.com/appendicitis/guide/causes/

  But when the organ becomes infected or obstructed, bacteria in the appendix multiply rapidly, causing your appendix to swell and fill with pus a thick liquid containing bacteria, tissue cells, inflammatory debris, and dead infection-fighting white blood cells. […] Theres no way to predict who will get appendicitis, but scientists have uncovered several risk factors for the condition. These include: […] Theres also a link between air pollution in particular, high levels of ozone and appendicitis. Scientists arent sure why air pollution is associated with an increased risk of appendicitis, but it may be that high levels of ozone increase intestinal inflammation or increase susceptibility to bacterial and viral infections. […] Studies suggest that people get appendicitis more during the summer than at other times of the year. Its not clear why, but a review of over 40 years of research, published in Annals of Medical and Health Sciences Research, concludes that its likely due to a combination of increased exposure to air pollution and more GI infections during summer months.

• #60 Appendicitis In Kids and Teens (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/appendicitis.html

  Appendicitis happens when the appendix gets blocked, letting bacteria (germs) grow. […] Things that might block the appendix and cause appendicitis include: hard, rock-like stool (poop), swollen lymph nodes in the intestines, parasites and other infections. […] An infected appendix that isn’t treated is more likely to rupture. This can spread bacteria inside the body. The infection might form a large collection of pus (an abscess) or spread throughout the belly.

• #61 Appendicitis – Digestive Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/digestive-disorders/gastrointestinal-emergencies/appendicitis

  Appendicitis is inflammation and infection of the appendix. […] Often a blockage inside the appendix causes the appendix to become inflamed and infected. […] The cause of appendicitis is not fully understood. However, in most cases, a blockage inside the appendix probably starts a process. The blockage may be from a small, hard piece of stool (fecalith), a foreign body, tumor, or, rarely, even worms. As a result of the blockage, the appendix becomes inflamed and infected. […] A ruptured appendix may cause a pus-filled pocket of infection (abscess) to form. […] Without surgery or antibiotics (as might occur in a person in a remote location without access to modern medical care), appendicitis is fatal in many people.

• #62 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. […] Appendicitis is thought to be caused by luminal obstruction from various etiologies, leading to increased mucus production and bacterial overgrowth, resulting in wall tension and, eventually, necrosis and potential perforation. […] In a study of 375 children, risk factors for appendiceal perforation included fever, vomiting, longer duration of symptoms, elevated C-reactive protein level or white blood cell count, and ultrasound findings of free abdominal fluid, visualized perforation, or a mean appendix diameter of 11 mm or more. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Patient-related risk factors for perforation include older age, three or more comorbid conditions, and male sex. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #63 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. […] Appendicitis is thought to be caused by luminal obstruction from various etiologies, leading to increased mucus production and bacterial overgrowth, resulting in wall tension and, eventually, necrosis and potential perforation. […] In a study of 375 children, risk factors for appendiceal perforation included fever, vomiting, longer duration of symptoms, elevated C-reactive protein level or white blood cell count, and ultrasound findings of free abdominal fluid, visualized perforation, or a mean appendix diameter of 11 mm or more. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Patient-related risk factors for perforation include older age, three or more comorbid conditions, and male sex. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #64 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. […] Appendicitis is thought to be caused by luminal obstruction from various etiologies, leading to increased mucus production and bacterial overgrowth, resulting in wall tension and, eventually, necrosis and potential perforation. […] In a study of 375 children, risk factors for appendiceal perforation included fever, vomiting, longer duration of symptoms, elevated C-reactive protein level or white blood cell count, and ultrasound findings of free abdominal fluid, visualized perforation, or a mean appendix diameter of 11 mm or more. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Patient-related risk factors for perforation include older age, three or more comorbid conditions, and male sex. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #65 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. […] Appendicitis is thought to be caused by luminal obstruction from various etiologies, leading to increased mucus production and bacterial overgrowth, resulting in wall tension and, eventually, necrosis and potential perforation. […] In a study of 375 children, risk factors for appendiceal perforation included fever, vomiting, longer duration of symptoms, elevated C-reactive protein level or white blood cell count, and ultrasound findings of free abdominal fluid, visualized perforation, or a mean appendix diameter of 11 mm or more. […] Perforation is the most concerning complication of acute appendicitis and may lead to abscesses, peritonitis, bowel obstruction, fertility issues, and sepsis. […] Patient-related risk factors for perforation include older age, three or more comorbid conditions, and male sex. […] Time from symptom onset to diagnosis and surgery is directly associated with perforation risk.

• #66 Appendicitis – Digestive Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/digestive-disorders/gastrointestinal-emergencies/appendicitis

  Appendicitis is inflammation and infection of the appendix. […] Often a blockage inside the appendix causes the appendix to become inflamed and infected. […] The cause of appendicitis is not fully understood. However, in most cases, a blockage inside the appendix probably starts a process. The blockage may be from a small, hard piece of stool (fecalith), a foreign body, tumor, or, rarely, even worms. As a result of the blockage, the appendix becomes inflamed and infected. […] A ruptured appendix may cause a pus-filled pocket of infection (abscess) to form. […] Without surgery or antibiotics (as might occur in a person in a remote location without access to modern medical care), appendicitis is fatal in many people.

• #67 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  People with inflammatory bowel disease (i.e. ulcerative colitis or Crohn’s disease) are more likely to develop appendicitis. […] Appendicitis is caused by a blockage inside the appendix, which restricts blood flow, traps bacteria, and increases pressure within the organ. Sources of appendix blockages include infections caused by bacteria, viruses, or parasites, hard, stone-like stools, swollen lymph nodes, and inflammatory bowel disease.

• #68 Appendicitis – StatPearls – NCBI Bookshelf

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

  Appendicitis is primarily caused by obstruction of the appendiceal lumen leading to inflammation. The obstruction can be due to various factors such as appendicoliths, appendiceal tumors, intestinal parasites, or hypertrophied lymphatic tissues. These mechanical obstructions result in the development of acute appendicitis. […] It is important to note that the underlying causes of luminal obstructions may vary among different age groups, highlighting the need for age-specific considerations when evaluating and managing appendicitis. […] The appendix is known to naturally host aerobic and anaerobic bacteria, including Escherichia coli and Bacteroides spp. Obstruction of the appendiceal lumen by any mechanism can cause an overgrowth of bacteria leading to acute inflammation and abscess formation. Recent studies utilizing next-generation sequencing techniques have revealed that patients with complicated perforated appendicitis exhibit a significantly higher bacterial phyla load than those with uncomplicated appendicitis. This finding suggests that the severity and complications of appendicitis may be associated with an increased abundance of bacterial species.

• #69 Symptoms & Causes of Appendicitis – NIDDK

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

  Appendicitis can have more than one cause. In many cases, the cause is not clear. Possible causes include […] hardened stool or growths that can block the opening inside the appendix […] enlarged tissue in the wall of your appendix, caused by infection in the digestive tract or somewhere else in your body […] inflammatory bowel disease.

• #70 Causes and Risk Factors of Appendicitis

  https://www.health.com/appendicitis-causes-7970773

  The causes of chronic appendicitis are not well understood. The leading theory suggests that chronic appendicitis develops due to a partial obstruction of the appendix. […] Appendicitis is not directly inherited, but there is some evidence that genetics may play a role in its development. […] Researchers have discovered variants in certain genes that are connected to an increased risk of appendicitis. […] Your risk of developing appendicitis is about three times higher if you have a first-degree relative (parent, sibling, or child) with a history of the condition. […] Certain risk factors can increase your chances of developing appendicitis. […] A diet low in fiber and high in processed foods is associated with an increased risk of constipation and hard stools, which may lead to an appendix blockage.

• #71 Appendicitis: Signs & Symptoms, Causes, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/8095-appendicitis

  The theory of chronic appendicitis is that something causes mild inflammation on and off for a long time. It might be a chronic condition like inflammatory bowel disease or mild bacterial overgrowth. Or it might be an obstruction that moves in and out of the opening to your appendix. Chronic inflammation can lead to lymphoid hyperplasia or even scar tissue in your appendix if it lasts a very long time. […] Having a family history of appendicitis does appear to raise your risk of developing it, though its not clear why. Appendicitis itself is not inherited, but genetics might be involved in some of its causes.

• #72 Appendicitis – Digestive Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/digestive-disorders/gastrointestinal-emergencies/appendicitis

  Appendicitis is inflammation and infection of the appendix. […] Often a blockage inside the appendix causes the appendix to become inflamed and infected. […] The cause of appendicitis is not fully understood. However, in most cases, a blockage inside the appendix probably starts a process. The blockage may be from a small, hard piece of stool (fecalith), a foreign body, tumor, or, rarely, even worms. As a result of the blockage, the appendix becomes inflamed and infected. […] A ruptured appendix may cause a pus-filled pocket of infection (abscess) to form. […] Without surgery or antibiotics (as might occur in a person in a remote location without access to modern medical care), appendicitis is fatal in many people.

• #73 Appendicitis Guide: Causes, Symptoms and Treatment Options

  https://www.drugs.com/health-guide/appendicitis.html

  Appendicitis is an inflammation of the appendix, a small, fingerlike tube that hangs from the lower right side of the large intestine. The purpose of the appendix is not known. It usually becomes inflamed because of an infection or an obstruction in the digestive tract. If untreated, an infected appendix can burst and spread the infection throughout the abdominal cavity and into the bloodstream. […] There is no way to prevent appendicitis. […] The standard treatment is to remove the appendix. The surgery, called an appendectomy, should be done as soon as possible to reduce the risk of the appendix rupturing. If appendicitis is strongly suspected, a surgeon will often advise removing the appendix even if an ultrasound or CT scan cannot confirm the diagnosis. The surgeon’s recommendation to operate reflects the danger of a ruptured appendix: It can be life threatening, while an appendectomy is a relatively low-risk operation.

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