Materiały źródłowe

• #1 Pouchitis: Epidemiology, pathogenesis, clinical features, and diagnosis – UpToDate

  https://www.uptodate.com/contents/pouchitis-epidemiology-pathogenesis-clinical-features-and-diagnosis

  Pouchitis: Epidemiology, pathogenesis, clinical features, and diagnosis […] Pouchitis is an inflammatory disorder that typically presents with increased stool frequency and urgency and is a common complication of IPAA or a continent ileostomy (eg, Kock pouch). […] This topic will review the epidemiology, pathogenesis, clinical features, and diagnosis of acute pouchitis.

• #1 Diagnosis and Treatment of Pouchitis

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3093723/

  Ileal pouch-anal anastomosis following total proctocolectomy has become part of the standard surgical treatment for patients with ulcerative colitis or familial adenomatous polyposis who require colectomy. […] The diagnosis and differential diagnosis of pouchitis are not straightforward, and the management of pouchitis, particularly chronic antibiotic-refractory pouchitis, which is one of the leading causes of pouch failures, can be challenging. […] The diagnosis of pouchitis should not depend solely upon the presenting symptoms of a patient. The severity of symptoms does not necessarily correlate with the degree of endoscopic or histologic inflammation of the pouch. […] A combined assessment of symptoms and endoscopic and histologic features is ideal for the diagnosis and differential diagnosis of pouchitis.

• #1 Diagnosis and Treatment of Pouchitis

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3093723/

  There are no universally accepted diagnostic criteria for pouchitis. […] Pouch endoscopy yields valuable information on the severity and extent of mucosal inflammation, the presence or absence of concurrent backwash ileitis, CD of the pouch or cuffitis, and the presence or absence of structural abnormalities such as strictures, sinus openings, and fistula openings. […] In cases of suspected complicated pouchitis, CD of the pouch and complications related to surgical procedures should be excluded. […] The disease course of pouchitis varies. Pouchitis likely represents a disease spectrum from acute, antibiotic-responsive to chronic, antibiotic-refractory. […] Although the majority of patients with pouchitis respond favorably to antibiotic therapy, particularly in the initial stages of disease, some patients develop pouchitis refractory to routine antibiotic treatment.

• #1 Pouchitis: What It Is, Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/15484-pouchitis

  Pouchitis diagnosis begins with reviewing your symptoms and health history. Your healthcare provider will then examine the inside of your pouch. They do this by inserting an endoscope into the pouch a tiny camera attached to a narrow tube. Theyll look for inflammation and other abnormalities. They can also take a tissue sample (biopsy) through the endoscope and check it for possible contributing causes. […] Additional tests may include: Contrast pouchography (pouchogram). This is a type of X-ray that involves injecting a contrast solution into your pouch to make it stand out. Its the ileal pouch version of a barium enema. CT scan. MRI. […] First-line treatment for acute pouchitis is a two-week course of antibiotics. This works for most people. If it doesnt work for you, your provider will try a longer course with a different antibiotic, or a combination. If you still have symptoms after four weeks, you have antibiotic-resistant pouchitis. Theyll need to do some more testing for possible causes before your provider can determine the best treatment.

• #1 Navigating Chronic Pouchitis: Pathogenesis, Diagnosis, and Management – Gastroenterology & Hepatology

  https://www.gastroenterologyandhepatology.net/archives/january-2025/navigating-chronic-pouchitis-pathogenesis-diagnosis-and-management/

  This led to the development of the Monash Pouchitis Score (MPS), which revised the endoscopic component of the PDAI to include 3 ordinal categories: bleeding (absent, contact, spontaneous), erosions (absent, <10, ≥10), and ulceration (absent, <10%, ≥10%). [...] An effective endoscopic assessment of pouchitis should document whether the inflammation is diffuse or focal, as focal inflammation is associated with better outcomes for pouch survival. [...] Additionally, the presence of ulceration at the ileal pouch inlet should be noted owing to its association with an increased risk of developing strictures, which are a significant risk factor for pouch failure. [...] Finally, the extent and severity of associated prepouch ileitis should be documented, ideally using the SES-CD, as moderate-to-severe prepouch ileitis is also linked to a higher risk of pouch failure.

• #1 Inflammatory pouch disease: The spectrum of pouchitis

  https://www.wjgnet.com/1007-9327/full/v21/i29/8739.htm

  Pouchoscopy guides the next steps of the diagnostic work-up and, finally, the treatment. […] The mucosal vascular pattern has been lost and the mucosa is characterized by diffuse redness, severe edema with erosions and ulcers. […] Specific histological features often help with the differential diagnosis. […] Histology can help by characterizing the inflammation as acute or chronic, and by providing information useful for the differential diagnosis.

• #1 Pouchitis: Clinical Features, Diagnosis, and Treatment

  https://pmc.ncbi.nlm.nih.gov/articles/PMC8318718/

  A total PDAI score of 7 points is considered diagnostic for pouchitis, but this score is not specific and irritable pouch syndrome or other inflammatory disorders of the pouch can also elevate the PDAI. […] Biopsies should be taken from the mucosa of the pouch body and from the mucosa of the afferent limb above the pouch, and not along the stapled line. […] Histological findings of pouchitis which include acute inflammation with polymorphonuclear leukocyte infiltration, crypt abscesses and ulceration, in association with a chronic inflammatory infiltrate, are also non-specific; moreover, there might be discrepancy between endoscopic and histologic findings in pouchitis. […] Accurate diagnosis and classification are important for appropriate management.

• #1 Navigating Chronic Pouchitis: Pathogenesis, Diagnosis, and Management – Gastroenterology & Hepatology

  https://www.gastroenterologyandhepatology.net/archives/january-2025/navigating-chronic-pouchitis-pathogenesis-diagnosis-and-management/

  Thus, pouchoscopy with biopsies remains the gold standard for evaluating pouch-related symptoms, allowing for the assessment of the prepouch ileum, the cuff, and any structural complications. […] Several diagnostic indices have been developed that evaluate all or some of these components; however, none are fully validated, and all exhibit limitations in accuracy, reliability, and responsiveness to treatment. […] The most commonly used index in both clinical practice and research is the Pouchitis Disease Activity Index (PDAI) or its modifications. […] The PDAI is an 18-point composite index of equally weighted clinical, endoscopic, and acute histologic items. […] A diagnosis of pouchitis is confirmed with a PDAI score of at least 7. […] One of the primary challenges with existing diagnostic indices for pouchitis, particularly with the PDAI and mPDAI, is the significant variability in intra- and interrater reliability of endoscopic features.

• #1 Diagnosis and Medical Treatment of Acute and Chronic Idiopathic Pouchitis in Inflammatory Bowel Disease

  https://www.mdpi.com/1648-9144/60/6/979

  Pouchitis is diagnosed based on symptoms and endoscopic and histologic findings. Clinical symptoms associated with pouchitis are urgency, increase in stool frequency, decrease in stool consistency and lower quadrant abdominal pain. There are no validated scoring systems for the diagnosis and assessment of pouchitis. Although not validated, the Pouchitis Disease Activity Index (PDAI) was formulated. It takes into account clinical symptoms, endoscopic aspect and acute histologic findings with a score of at least seven defining pouchitis. The Heidelberg Pouchitis Activity Score (PAS) takes into account the histological aspect of chronic inflammation and describes three grades of pouch inflammation. It is important to note that symptoms, endoscopic findings and histology are not well correlated to each other, so in the case of the clinical suspicion of pouchitis, an endoscopic evaluation with biopsies of the lesions needs to be performed to assess pouch inflammation in order to distinguish between pouchitis and other pouch disorders such as functional disorders of the pouch. Endoscopic findings in pouchitis consist of the presence of decreased vascular pattern, friability of the mucosa, granularity, erythema, erosions and ulcerations. Serological markers such as C-reactive protein (CRP) and fecal calprotectin can be further used to assess inflammation in disease monitoring.

• #1 Thieme E-Journals – Zeitschrift für Gastroenterologie / Abstract

  https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0033-1347533

  The diagnosis of pouchitis requires both pouch endoscopy and biopsy. […] The aim of our prospective study was to compare fecal calprotectin in patients with and without pouchitis assessed by clinical, endoscopic and histological scores and to evaluate the diagnostic accuracy of fecal calprotectin in pouchitis. […] Pouchitis was detected in 30% of the patients. […] Fecal calprotectin was significantly higher in patients with vs. without pouchitis (560 vs. 82, p=0.01), but not with cuffitis. […] The cut-off value for fecal calprotectin in the diagnosis of pouchitis revealed to be 182g/g with a sensitivity of 99.9% and a specificity of 69.2%. […] Fecal calprotectin proved to be a reliable marker for the determination of pouch inflammation which may be helpful in the diagnosis of pouchitis and in the differentiation between pouchitis and cuffitis.

• #1 Management of Acute and Chronic Pouchitis | Abdominal Key

  https://abdominalkey.com/management-of-acute-and-chronic-pouchitis/

  Laboratory testing is often necessary as a part of the evaluation of patients with pouch disorders, particularly in patients with chronic pouchitis. […] Fecal assays of lactoferrin and calprotectin have been evaluated for the diagnosis and differential diagnosis of pouchitis. However, the use of laboratory tests may not replace pouch endoscopy as the first-line evaluation for the diagnosis and differential diagnosis of pouchitis. […] The natural history of pouchitis is poorly defined. Pouchitis likely represents a disease spectrum from acute, antibiotic-responsive, bacteria-associated entity to chronic, antibiotic-refractory, immune-mediated entity. […] Based on the etiology, disease duration and activity, and response to medical therapy, pouchitis can be categorized into: (1) idiopathic vs. secondary (with etiology such as NSAID use and Clostridium difficile or CMV infection), (2) acute vs. chronic (with a cutoff of 4 weeks of persistent symptoms being defined as chronic pouchitis), (3) infrequent episodes vs. relapsing vs. continuous, and (4) responsive vs. refractory to antibiotic therapy.

• #1 Key Focus Areas in Pouchitis Therapeutic Status: A Narrative Review

  https://ijms.sums.ac.ir/article_50229.html

  Therefore, taking biopsies from the pouch and afferent limb can help distinguish between pouchitis, CMV infection, CD, dysplasia, and ischemic pouchitis. […] Another diagnostic criterion described for diagnosis of pouchitis is an assessment of Pouchitis Disease Activity Index (PDAI), while PDAI7 and mPDAI5 were established as diagnosis of pouchitis, PDAI scoring system investigates stool frequency, rectal bleeding, fecal urgency, fever, and endoscopic and histologic inflammation, and a PDAI score equal to or greater than 7 verifies pouchitis. […] Quick biomarkers such as fecal lactoferrin have been used in the diagnosis of pouchitis. […] Fecal calprotectin is a zinc- and calcium-binding protein and another quick, reliable, and inexpensive mucosal inflammatory biomarker with a high sensitivity and good reproducibility found in the cytoplasm of neutrophils for detection of pouchitis patients using ELISA and enzyme fluoroimmunoassays. […] The neutrophil-to-lymphocyte ratio (NLR) in 79 patients who underwent IPAA can have a diagnostic role in predicting the development of pouchitis after IPAA in clinical practice.

• #1 European Crohn´s and Colitis Organisation – ECCO – Pouchitis: Practical Points for Pathologists

  https://www.ecco-ibd.eu/publications/ecco-news/committee-news/item/pouchitis-practical-points-for-pathologists.html

  Pouchitis refers to a chronic relapsing inflammatory condition with active inflammation of IPAA mucosa and is considered to be a primary non-specific, idiopathic inflammation of the neorectal ileal mucosa. […] Diagnosis of pouchitis based on symptoms alone has been shown to be non-specific since symptoms can originate from a myriad of aetiologies, not necessarily inflammatory in nature. As a result, the diagnosis of pouchitis should generally be based on presence of the appropriate constellation of symptoms, combined with endoscopic and histological assessment. […] According to ECCO-ESP Histopathology Consensus statement 21: For a proper histologic evaluation of pouchitis multiple biopsies are recommended. […] Various scoring systems have been developed to standardise the diagnosis and assessment of the severity of pouchitis. The Pouchitis Disease Activity Index (PDAI) quantitates clinical symptoms and endoscopic and histological features (acute histological inflammation: crypt abscess and ulceration) on three separate six-point scores, whereby a total score higher than 7 is indicative of pouchitis.

• #1 Pouchitis in inflammatory bowel disease: a review of diagnosis, prognosis, and treatment

  https://www.irjournal.org/journal/view.php?number=882

  Pouchitis is classified as acute or chronic pouchitis. Acute pouchitis is defined as symptoms lasting less than 4 weeks and responding to 2-week courses of antibiotics. Chronic pouchitis is defined as having symptoms lasting longer than 4 weeks despite standard antibiotic courses and requiring chronic antibiotics or anti-inflammatory therapy. The diagnosis of pouchitis is based on the combined assessment of symptoms, endoscopic, and histologic findings. Sandborn et al. proposed the pouchitis disease activity index (PDAI), consisting of not only the score of clinical symptoms, but also endoscopic and histological scores. The most frequently reported symptoms of pouchitis are increased bowel movement frequency, urgency, abdominal cramping, and pelvic discomfort. However, these symptoms are not specific for pouchitis, as following conditions could share these symptoms: infections including cytomegalovirus (CMV) and Clostridioides difficile, pouch-outlet obstruction, anal sphincter or pelvic floor dysfunction, decreased pouch compliance or emptying, pouch or anastomotic stricture, CD of the pouch, immune-mediated pouchitis, cuffitis, irritable pouch syndrome, and small intestinal bacterial overgrowth. To rule out other differential diagnoses as described above, serum or stool tests, imaging studies, and functional tests should be considered. The diagnostic strategy for pouchitis is described in Fig. 1. If patients with proctocolectomy and IPAA have symptoms suggestive of pouchitis, pouchoscopy should be recommended. A recent study also showed that mucosal breaks including ulcers and/or erosions were observed in about 20% of asymptomatic patients and were associated with an increased risk of acute pouchitis. Hence, pouchoscopy is an essential procedure to confirm the diagnosis of pouchitis. During pouchoscopy, it is important for providers to define the endoscopic phenotype of the J pouch based on the observation of different anatomic areas of the J pouch. Persistent inflammation in a strip of rectal cuff is also a major complication in IBD patients treated by proctocolectomy with IPAA and cuff biopsies are helpful to diagnose cuffitis. The rate of pouch failure requiring diversion ileostomy or pouch excision has been reported to be as high as 10% and several risk factors contributing to the failure have been reported. CD of the pouch can develop in a subset of UC patients treated by proctocolectomy with IPAA and is the most frequent reason for pouch failure and excision. A recent meta-analysis showed that, among 4,843 patients with an IPAA for UC or indeterminate colitis, 10.3% of patients were diagnosed with CD of the pouch. Although a uniform definition of CD of the pouch is still lacking, the most commonly reported diagnostic criteria were presence of fistula/fistulae, stricture involving the pouch or pre-pouch ileum, and presence of pre-pouch ileitis. The treatment includes antibiotics, 5-aminosalicylic acid products, corticosteroids, immunomodulators, and biologics and the efficacy of these treatments remains inconsistent across studies. The standard proactive monitoring of pouch inflammation and surveillance of pouch neoplasia must be established for IBD patients after proctocolectomy with IPAA.

• #1 European Crohn´s and Colitis Organisation – ECCO – Pouchitis: Practical Points for Pathologists

  https://www.ecco-ibd.eu/publications/ecco-news/committee-news/item/pouchitis-practical-points-for-pathologists.html

  Pouchitis should be distinguished from cuffitis, i.e. inflammation in the columnar cuff mucosa distal to the pouch, or islands of columnar mucosa that may be left behind. […] Finally, histological assessment should also help to rule out opportunistic infections (cytomegalovirus) and dysplastic changes. […] In conclusion, assessment of mucosa from IPAA for UC can be a valuable tool when diagnosing pouchitis, but pathologists must be familiar with the concept of adaptive changes, be aware that activity of inflammation needs to be categorised and avoid misinterpretation of deep lymphoid follicles as synonymous with CD.

• #1 Pouchitis – Wikipedia

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

  Pouchitis is an umbrella term for inflammation of the ileal pouch, an artificial rectum surgically created out of ileum (the last section of the small intestine) in patients who have undergone a proctocolectomy or total colectomy (removal of the colon and rectum). […] The most reliable tool for diagnosis is endoscopy combined with histologic features (derived from tissue biopsies obtained during endoscopy). […] Once a diagnosis of pouchitis is made, the condition is further classified. The activity of pouchitis is stratified as: Remission (no active pouchitis), Mild to moderately active (increased stool frequency, urgency, infrequent incontinence), Severely active (hospitalised for dehydration, frequent incontinence). […] The duration of pouchitis is defined as acute (less than or equal to four weeks) or chronic (four weeks or more) and the pattern classified as infrequent (12 acute episodes), relapsing (three or fewer episodes) or continuous. Finally, the response to medical treatment as labelled as treatment responsive or treatment refractory, with the medication for either case being specified.

• #1 Management of Acute and Chronic Pouchitis | Abdominal Key

  https://abdominalkey.com/management-of-acute-and-chronic-pouchitis/

  The various classification categories for pouchitis are noted in Table 34.1. […] We recently proposed a new disease category of pouchitis, namely, autoimmune pouchopathy. […] Although there are currently no established diagnostic criteria, the diagnosis of autoimmune pouchopathy may be suspected if a patient has antibiotic-refractory pouchitis, concurrent autoimmune disorders (such as rheumatoid arthritis and Hashimotos thyroiditis), serum autoantibodies, and the presence of increased epithelial apoptosis. […] The diagnosis of CD of the pouch often needs a combined assessment of symptoms, endoscopy, histology, radiography, and sometimes examination under anesthesia. […] Pouch endoscopy is considered the first-line diagnostic modality. […] Currently, irritable pouch syndrome is a diagnosis of exclusion with symptoms but absence of endoscopic, radiographic, or histologic abnormalities. Pouch endoscopy is the diagnostic modality of choice for the distinction between pouchitis and irritable pouch syndrome.

• #1 Diagnosis and Management of IgG4-associated Pouchitis – Practical Gastro

  https://practicalgastro.com/2014/09/18/diagnosis-and-management-of-igg4-associated-pouchitis/

  Chronic pouchitis is an inflammatory complication of total proctocolectomy with ileal pouch-anal anastomosis that can be difficult to manage. The role of IgG4-associated inflammation in pouchitis is continuing to emerge. […] The focus of this review is on the emerging role of IgG4 in pouchitis and the implications for diagnosis and management. […] An association between ileal pouch inflammation and an elevated serum IgG4 level, or tissue infiltration by IgG4-expressing plasma cells, has been noted in a subgroup of IPAA patients. […] The clinical characteristics of patients with pouchitis and concomitant serum elevation of IgG4 were further assessed in a prospective study of symptomatic IPAA patients. […] These studies indicate that serum IgG4 elevation may be a useful biological marker of an increased risk for CARP.

• #1 Diagnosis and Management of IgG4-associated Pouchitis – Practical Gastro

  https://practicalgastro.com/2014/09/18/diagnosis-and-management-of-igg4-associated-pouchitis/

  The identification of increased numbers of infiltrating IgG4-positive plasma cells in pouch biopsies appears to be associated with an increased propensity for refractoriness to antibiotic therapy. […] IgG4-associated pouchitis (as defined by an increased number of infiltrating IgG4-positive plasma cells) is characterized clinically by an increased incidence of CARP as well as a concurrence with clinical markers of an immune-mediated process. […] The presence of IgG4-expressing plasma cells in pouch biopsy specimens is relatively common in symptomatic IPAA patients. […] While serum IgG4 level can be used as a non-invasive screening test, endoscopy with biopsies should be performed in IPAA patients in whom IgG4-associated inflammation (as well as IgG4-RD) is suspected. […] If there is sufficient clinical suspicion for IgG4-associated pouch inflammation, screening for IgG4 levels can be sought by checking of serum IgG subclasses.

• #1

  https://journals.lww.com/jcge/Fulltext/2004/05001/The_Diagnosis_and_Treatment_of_Pouchitis_in.13.aspx?generateEpub=Article%7Cjcge:2004:05001:00013%7C10.1097/01.mcg.0000124001.93146.ef%7C

  The ileal pouch anal anastomosis (IPAA) procedure has become the preferred surgical option for most patients with ulcerative colitis who require surgical removal of the colorectum. […] However approximately one fourth of patients will develop recurrent pouchitis, with 5% being categorized as chronic pouchitis requiring maintenance therapy or, on rare occasion, pouch excision. […] Thus, endoscopic investigation with biopsy is important for declaring whether a patient has pouchitis. […] Not surprisingly, treatment options for patients with pouchitis resemble that of regular inflammatory bowel disease, although there have only been a few controlled trials. […] Probiotics are effective for maintaining remission of pouchitis. […] Occasionally, patients with well-documented ulcerative colitis as the indication for IPAA will develop what appears to be Crohns disease of the pouch, on the basis of granulomatous inflammation, pre-pouch ileitis, or fistulae. […] With further elucidation of the genetic basis for inflammatory bowel disease, we should be able to more accurately classify patients with ulcerative colitis and Crohns disease genotypically.

• #1 Management of Acute and Chronic Pouchitis | Abdominal Key

  https://abdominalkey.com/management-of-acute-and-chronic-pouchitis/

  The management strategies vary based on the etiology, triggering factors, and classification of pouchitis. […] For antibiotic-responsive acute pouchitis, the first-line therapy includes a 14-day course of metronidazole (1520 mg/kg/day) or ciprofloxacin (1,000 mg/day). […] The management of chronic antibiotic-refractory pouchitis often poses a challenge. […] It is important to investigate contributing causes related to failure to antibiotic therapy. […] For chronic antibiotic-refractory pouchitis, a combined use of antibiotic agents with a prolonged course may be attempted. […] The management of pouchitis, particularly chronic pouchitis, can be difficult. […] Medical treatment of pouchitis is largely empiric, and only a few small randomized, placebo-controlled trials have been conducted. […] To date, there were no FDA-approved agents for pouchitis or other pouch disorders. […] A multidisciplinary approach involving gastroenterologists and colorectal surgeons, together with a team of GI pathologists and GI radiologists is advocated.

• #1 Diagnosis and Treatment of Pouchitis

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3093723/

  The natural history of pouchitis is poorly defined. […] Patients with initial episodes of pouchitis almost uniformly respond to antibiotic therapy. However, pouchitis relapse is common. […] The disease course of antibiotic-responsive pouchitis may evolve into antibiotic-dependent pouchitis and then antibiotic-refractory pouchitis. […] As medical therapy for pouchitis is largely antibiotic-based, management of antibiotic-dependent and antibiotic-refractory pouchitis remains a challenge.

• #1

  https://mentoringinibd.com/ibd-dialogue/volume-20/pouchitis/

  The objectives of this presentation were to examine how to diagnose pouch disorders, explore how to manage acute and chronic pouchitis, and discuss when to refer to a surgeon. […] A recent review suggests pouchitis is common, with a cumulative probability of 20% at 1 year after pouch formation and up to 40% at 5 years. […] Therefore, it is important to carefully assess the cause of pouch dysfunction, taking into consideration the initial indication for surgery, type of pouch and anastomosis, histopathology of the colectomy specimen, presence of extra-intestinal manifestations, history of bowel symptoms, previous pouch function and symptoms, potential GI infection, and current medications. […] The Pouch Disease Activity Index (PDAI) is an 18-point assessment tool that includes histologic, clinical, and endoscopic criteria, while the modified PDAI (mPDAI), is a shorter 12-point assessment, that excludes histology, while maintaining its diagnostic specificity and sensitivity.

• #1 A Review of the Diagnosis and Treatment of Inflammatory Pouch Conditions – Practical Gastro

  https://practicalgastro.com/2023/05/11/a-review-of-the-diagnosis-and-treatment-of-inflammatory-pouch-conditions/

  Diagnosis and treatment of inflammatory pouch conditions can be challenging given the overlapping symptoms and limited evidence. The aim of this review is to discuss acute pouchitis, chronic antibiotic dependent pouchitis, chronic antibiotic refractory pouchitis, Crohns disease like pouch inflammation, and cuffitis and summarize their management. […] The clinical, endoscopic, and histologic features of acute and chronic pouchitis overlap significantly, and it can be difficult to delineate the conditions despite laboratory studies and pouchoscopy. The key to delineating acute and chronic pouchitis is history specifically symptom duration and response to antibiotics. […] There is a spectrum of inflammatory pouch conditions that can occur after RPC with IPAA and it is crucial to properly diagnose each in order to choose the appropriate therapy.

• #1 Diagnosing Pouchitislogo-32logo-40logo-60NEJM Journal WatchnejmJW_1L_RGB-b

  https://www.jwatch.org/jg200109250000004/2001/09/25/diagnosing-pouchitis

  The authors of this paper provide a convincing argument that diagnoses of pouchitis are established most reliably by combining symptoms with endoscopic and histologic findings. Although I suspect many clinicians will continue to use symptoms and antibiotic response for diagnosing pouchitis, even fervent practitioners of empirical therapy will find this information useful for establishing the correct diagnosis and for guiding therapy in refractory patients. […] Shen B et al. Endoscopic and histologic evaluation together with symptom assessment are required to diagnose pouchitis. Gastroenterology 2001 Aug 121 261267

• #1

  https://www.wjgnet.com/1007-9327/full/v13/i42/5598.htm

  In cases of suspected complicated pouchitis, imaging studies such as contrasted pouchography, CT and MRI are typically used to assess the presence of mucosal and transmural disease activity within and around the pouch. […] Wireless capsule endoscopy appears safe in patients with IPAA, which has been used for diagnostic evaluation in patients with chronic pouchitis.

• #1 SciELO Brazil – DIAGNOSTIC AND MANAGEMENT APPROACH TO POUCHITIS IN INFLAMMATORY BOWEL DISEASE DIAGNOSTIC AND MANAGEMENT APPROACH TO POUCHITIS IN INFLAMMATORY BOWEL DISEASE

  https://www.scielo.br/j/ag/a/TR4Vb4DGXdH6D7Zw4RVHgKg/?lang=en

  When pouchitis do not respond to antibiotic/probiotic therapy, and the condition persists for more than four weeks, it is called chronic pouchitis, which occurs in 10%-15% of all cases. Chronic pouchitis can be classified into two entities: chronic antibiotic-dependent pouchitis, where pouchitis recurs at least three times a year after discontinuing antibiotic therapy, and chronic antibiotic-refractory pouchitis, when the condition does not respond to antibiotic therapy. […] In a prospective study in patients with a pouch, a good correlation between the findings of the resonance and the endoscopic scores was found, with a positive likelihood ratio of four and a negative LR of 0.1829. […] Primary or idiopathic pouchitis is characterized by the difficulty to investigate a triggering factor of the condition. It is believed that its origin lies in the presence of a mucosal dysbiosis that would alter the immune response of the mucosa. Ruling out of secondary causes should support its diagnosis.

• #1 Pouchitis: Symptoms, Causes, Diagnosis, and Treatment

  https://www.verywellhealth.com/pouchitis-8364291

  Pouchitis is an inflammation that occurs in some people who have had ileal pouch-anal anastomosis (IPAA) surgery. […] Pouchitis is often diagnosed by a healthcare provider when pouch function suddenly worsens, causing diarrhea and other symptoms. […] Some healthcare providers may want to look at the pouch with an endoscopic procedure before or after treating for pouchitis. […] A healthcare provider (usually a gastroenterologist or a colorectal surgeon) will give directions and do the procedure. […] Chronic pouchitis is associated with a risk of pouch failure. […] It’s recommended that people with chronic pouchitis get a pouchoscopy to look at the interior of the pouch every one to two years. […] Pouchitis is a common condition after having ileal pouch surgery. Most cases of pouchitis will get better with a two- to four-week course of one or more antibiotics. […] If pouchitis doesn’t respond, a step-up approach to using different therapies, including biologics, might be tried.

• #1 Navigating Chronic Pouchitis: Pathogenesis, Diagnosis, and Management – Gastroenterology & Hepatology

  https://www.gastroenterologyandhepatology.net/archives/january-2025/navigating-chronic-pouchitis-pathogenesis-diagnosis-and-management/

  Abstract: Chronic pouchitis affects 13% to 17% of patients with ileal pouch–anal anastomosis and ulcerative colitis, and 20% with a history of acute pouchitis. […] A diagnostic index combining clinical, endoscopic, and histologic components is essential for clinical practice and research. […] This article aims to discuss the pathogenesis of chronic idiopathic pouchitis, present a pragmatic approach to accurately diagnose chronic pouchitis and assess its severity, and discuss the data supporting treatment strategies. […] The diagnosis of pouchitis should be based on a comprehensive assessment that includes clinical symptoms and macroscopic and microscopic evaluations of the pouch mucosa. […] As symptoms alone do not provide a definitive diagnosis, they must be integrated with endoscopic and histologic findings, each contributing independently to confirming pouchitis.

• #2 Diagnosis and Treatment of Pouchitis

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3093723/

  Ileal pouch-anal anastomosis following total proctocolectomy has become part of the standard surgical treatment for patients with ulcerative colitis or familial adenomatous polyposis who require colectomy. […] The diagnosis and differential diagnosis of pouchitis are not straightforward, and the management of pouchitis, particularly chronic antibiotic-refractory pouchitis, which is one of the leading causes of pouch failures, can be challenging. […] The diagnosis of pouchitis should not depend solely upon the presenting symptoms of a patient. The severity of symptoms does not necessarily correlate with the degree of endoscopic or histologic inflammation of the pouch. […] A combined assessment of symptoms and endoscopic and histologic features is ideal for the diagnosis and differential diagnosis of pouchitis.

• #2 Pouchitis: Clinical Features, Diagnosis, and Treatment

  https://pmc.ncbi.nlm.nih.gov/articles/PMC8318718/

  Procto-colectomy with an ileal pouch anal anastomosis is the procedure of choice for ulcerative colitis patients that require colectomy. […] Accurate diagnosis and classification is the key factor for an adequate management, and exclusion of secondary causes of pouchitis is pivotal. […] Diagnosis CD of the pouch can occur at a distance from surgery with an increasing cumulative incidence over time. […] The diagnosis of pouchitis should not be based only on symptoms assessment; endoscopic evaluation with biopsies of the mucosa of the pouch body and of the afferent limb is the most important tool for the diagnosis and differential diagnosis. […] Once secondary pouchitis is ruled-out a diagnosis of CARP is made. […] There are several diagnostic indices to assess inflammation of the pouch.

• #2

  https://www.wjgnet.com/1007-9327/full/v13/i42/5598.htm

  Pouchitis as the most common long-term complication represents a spectrum of disease processes ranging from acute, antibiotic-responsive type to chronic antibiotic-refractory entity. […] Accurate diagnosis using a combined assessment of symptoms, endoscopy and histology and the stratification of clinical phenotypes is important for treatment and prognosis the disease. […] However, management of chronic antibiotic-refractory pouchitis remains a challenge. […] Accurate diagnosis and classification of pouchitis are important for its proper management and prognosis. […] Making diagnosis of pouchitis should not solely rely on presenting symptoms. […] A combined assessment of symptoms, endoscopic and histologic features is the key to making an accurate diagnosis and it is necessary to differentiate pouchitis from other inflammatory and non-inflammatory disorders of the pouch such as cuffitis, pouch stricture, pouch sinus, and IPS.

• #2 Mayo Clinic Health Library – Pouchitis | Swiss Medical Network

  https://www.swissmedical.net/en/healtcare-library/con-20306105

  To diagnose pouchitis, a healthcare professional will likely start by taking a medical history and doing a physical exam. […] Confirming the diagnosis may include tests, such as: […] Lab tests. Blood tests may be done to look for other medical conditions. Stool tests may be done to look for infection. The results can help determine what type of antibiotics are best for treatment. […] Endoscopy. Endoscopy uses a tiny camera on the end of a flexible tube to visually examine the ileal pouch. During endoscopy, a sample of tissue, called a biopsy, may be collected for testing. […] Imaging. A healthcare professional may recommend an imaging test, such as MRI or CT scanning, to find out what is causing symptoms.

• #2 Pouchitis – What You Need to Know

  https://www.drugs.com/cg/pouchitis.html

  How is pouchitis diagnosed? […] Your healthcare provider will examine you. The provider will ask about your symptoms and health history. You may be given contrast liquid before some of the following tests. Tell the healthcare provider if you have ever had an allergic reaction to contrast liquid. […] Blood and urine tests may show signs of infection or inflammation. […] Pouchography is a type of x-ray. Your provider will inject contrast into your pouch. The contrast material helps the pouch show up in the pictures. […] CT scan or MRI pictures may be used to find problems with your pouch or in your intestines. […] Pouchoscopy may be used to check inside the pouch with a scope (thin, flexible tube). Tissue samples may also be taken.

• #2 Chronic pouchitis: what every gastroenterologist needs to know | Frontline Gastroenterology

  https://fg.bmj.com/content/16/2/143

  The role for investigations in the setting of suspected pouchitis is to therefore facilitate accurate diagnosis while excluding other causes. […] Ultimately, while non-invasive biomarkers or imaging are often applied, endoscopic evaluation of the pouch (pouchoscopy) remains the gold standard for both diagnosis and severity assessment. […] The management of chronic pouchitis encompasses a multimodal approach tailored to individual patient characteristics and disease severity. […] As discussed in Acute pouchitis section antibiotics, including metronidazole, rifaximin and ciprofloxacin, are the first-line therapy for mild to moderate disease, targeting both luminal bacteria and mucosal inflammation. […] The management of chronic pouchitis requires a personalised approach.

• #2 Pouchitis, a complication associated with the surgical treatment of ulcerative colitis. Diagnosis and treatment. Review

  http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-99572021000100065

  Endoscopic findings include erythema, edema, friability, granularity, spontaneous bleeding or bleeding on contact with the endoscope, ulcers, inflammatory polyps, mucosal bridges and decreased distensibility. The presence of ulcers or erosions on the anastomosis alone is not suggestive of pouchitis. Biopsies should be performed by taking samples from the pouch and the proximal loop of the ileum; samples from the suture line must be avoided. Although the inflammation is located in the ileal pouch, sometimes it extends more proximally and affects the ileum proximal to the pouch. The involvement of the ileum proximal to the pouch is known as pre-pouch ileitis. In said study, concomitant pouchitis was reported in half of the patients, and granulomas were found in one case according to the histopathology reported, which is a very important finding, since Crohn’s disease can be erroneously diagnosed.

• #2 Pouchitis: Clinical Features, Diagnosis, and Treatment | IJGM

  https://www.dovepress.com/pouchitis-clinical-features-diagnosis-and-treatment-peer-reviewed-fulltext-article-IJGM

  The diagnosis of pouchitis should not be based only on symptoms assessment; endoscopic evaluation with biopsies of the mucosa of the pouch body and of the afferent limb is the most important tool for the diagnosis and differential diagnosis. […] In a study including consecutive asymptomatic patients after pouch surgery for UC, undergoing surveillance pouchoscopy, incidental abnormal endoscopic and/or histologic findings were common, suggesting the utility of endoscopic surveillance. […] Histological findings of pouchitis which include acute inflammation with polymorphonuclear leukocyte infiltration, crypt abscesses and ulceration, in association with a chronic inflammatory infiltrate, are also non-specific; moreover, there might be discrepancy between endoscopic and histologic findings in pouchitis. […] We suggest to perform biopsies at every pouch endoscopy performed.

• #2 Diagnosing Pouchitislogo-32logo-40logo-60NEJM Journal WatchnejmJW_1L_RGB-b

  https://www.jwatch.org/jg200109250000004/2001/09/25/diagnosing-pouchitis

  Diagnosing Pouchitis […] In clinical practice, pouchitis diagnosis often is based on symptoms alone or symptom response to antibiotics. To examine whether symptoms correlate with histologic and endoscopic findings, researchers assessed 46 patients with ulcerative colitis and ileal pouches using the Pouchitis Disease Activity Index (PDAI) as the gold standard for diagnosis. The PDAI score allows independent evaluation of symptom severity, endoscopic findings, and histologic findings. […] Twenty-two patients with PDAI scores ≥ 7 were considered to have pouchitis, and 24 patients with PDAI scores < 7 were thought to not have pouchitis. Mean symptom scores, endoscopy scores, and histology scores were all higher in the pouchitis group, and these 3 components contributed similarly to the total PDAI score in this group. However, 25 percent of patients with symptoms suggestive of pouchitis did not meet PDAI diagnostic criteria for this condition. In addition, 36 percent of patients with minimal symptoms exhibited endoscopic and histologic inflammation and had PDAI scores ≥ 7. Symptom, endoscopy, and histology scores were correlated poorly, indicating that each score contributed independently to the PDAI score.

• #2 Key Focus Areas in Pouchitis Therapeutic Status: A Narrative Review

  https://ijms.sums.ac.ir/article_50229.html

  Therefore, taking biopsies from the pouch and afferent limb can help distinguish between pouchitis, CMV infection, CD, dysplasia, and ischemic pouchitis. […] Another diagnostic criterion described for diagnosis of pouchitis is an assessment of Pouchitis Disease Activity Index (PDAI), while PDAI7 and mPDAI5 were established as diagnosis of pouchitis, PDAI scoring system investigates stool frequency, rectal bleeding, fecal urgency, fever, and endoscopic and histologic inflammation, and a PDAI score equal to or greater than 7 verifies pouchitis. […] Quick biomarkers such as fecal lactoferrin have been used in the diagnosis of pouchitis. […] Fecal calprotectin is a zinc- and calcium-binding protein and another quick, reliable, and inexpensive mucosal inflammatory biomarker with a high sensitivity and good reproducibility found in the cytoplasm of neutrophils for detection of pouchitis patients using ELISA and enzyme fluoroimmunoassays. […] The neutrophil-to-lymphocyte ratio (NLR) in 79 patients who underwent IPAA can have a diagnostic role in predicting the development of pouchitis after IPAA in clinical practice.

• #2

  https://experts.mcmaster.ca/display/publication1917339

  PURPOSE: Total proctocolectomy (TPC) with ileal pouch anal anastomosis (IPAA) is commonly performed for patients with refractory ulcerative colitis (UC). Pouchitis occurs in 20-50% of these patients. Fecal calprotectin is a biomarker that correlates well with the pouchitis disease activity index. However, its role in the diagnosis and management of acute pouchitis has not been thoroughly defined. The aim of this study is to review previously established cut-off values and contextualize the clinical utility of fecal calprotectin. […] CONCLUSION: Fecal calprotectin may be a reliable diagnostic tool for acute pouchitis in patients following TPC with IPAA for UC. The high sensitivity of fecal calprotectin for detection of pouchitis makes it a valuable test for ruling out pouchitis. When used in conjunction with other biomarkers, the high specificity offers value in ruling in pouchitis. However, given the complexity of this disease process, relying solely on biomarkers for diagnosis is currently unreasonable.

• #2 Key Focus Areas in Pouchitis Therapeutic Status: A Narrative Review

  https://ijms.sums.ac.ir/article_50229.html

  Moreover, for disease differential diagnosis in pouchitis patients, utilizing serum or stool or functional tests, imaging assessments for infections of CMV and C. difficile, and examination for anal sphincter or pelvic floor dysfunction, pouch-outlet obstruction, decreased pouch compliance or emptying, CD of the pouch, anastomotic stricture, any immune-mediated intestinal inflammation, intestinal bacterial overgrowth, cuffitis, and irritable pouch syndrome should be undertaken. […] The major endoscopic findings in pouchitis can be edema, erythema, hemorrhage, friability, absent vascular pattern, erosions, ulcerations, chronic inflammatory infiltrates, as well as crypt abscesses, crypt distortion, and villous atrophy that are typically distributed throughout the pouch body. […] A combination of the degree of mononuclear cell infiltration, segmental distribution of mononuclear cell infiltration, and eosinophil infiltration from histological criteria can have utility in the prediction of the future development of pouchitis.

• #2 Management of Acute and Chronic Pouchitis | Abdominal Key

  https://abdominalkey.com/management-of-acute-and-chronic-pouchitis/

  Laboratory testing is often necessary as a part of the evaluation of patients with pouch disorders, particularly in patients with chronic pouchitis. […] Fecal assays of lactoferrin and calprotectin have been evaluated for the diagnosis and differential diagnosis of pouchitis. However, the use of laboratory tests may not replace pouch endoscopy as the first-line evaluation for the diagnosis and differential diagnosis of pouchitis. […] The natural history of pouchitis is poorly defined. Pouchitis likely represents a disease spectrum from acute, antibiotic-responsive, bacteria-associated entity to chronic, antibiotic-refractory, immune-mediated entity. […] Based on the etiology, disease duration and activity, and response to medical therapy, pouchitis can be categorized into: (1) idiopathic vs. secondary (with etiology such as NSAID use and Clostridium difficile or CMV infection), (2) acute vs. chronic (with a cutoff of 4 weeks of persistent symptoms being defined as chronic pouchitis), (3) infrequent episodes vs. relapsing vs. continuous, and (4) responsive vs. refractory to antibiotic therapy.

• #2 Pouchitis: What It Is, Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/15484-pouchitis

  If acute pouchitis goes away with treatment but then comes back, your provider will treat it again in the same way. The treatment is the same as long as it continues to work and you dont have relapses too often. If you have more than three relapses in a year, healthcare providers consider this chronic antibiotic-dependent pouchitis. They treat this with long-term maintenance therapy to prevent relapse. […] If your pouchitis never improved with antibiotics, or if it once did, but it no longer does, healthcare providers call this chronic antibiotic-resistant pouchitis (CARP). Your provider will begin by looking for possible overlooked causes, like a secondary infection, an autoimmune disease or a structural defect in your pouch. When theres no apparent cause, they treat chronic pouchitis like inflammatory bowel disease. […] Symptoms of acute pouchitis usually improve within a few days of beginning antibiotic treatment. Its important to complete the whole two-week course of antibiotics, though, even if youre feeling better.

• #2 Management of Acute and Chronic Pouchitis | Abdominal Key

  https://abdominalkey.com/management-of-acute-and-chronic-pouchitis/

  The management strategies vary based on the etiology, triggering factors, and classification of pouchitis. […] For antibiotic-responsive acute pouchitis, the first-line therapy includes a 14-day course of metronidazole (1520 mg/kg/day) or ciprofloxacin (1,000 mg/day). […] The management of chronic antibiotic-refractory pouchitis often poses a challenge. […] It is important to investigate contributing causes related to failure to antibiotic therapy. […] For chronic antibiotic-refractory pouchitis, a combined use of antibiotic agents with a prolonged course may be attempted. […] The management of pouchitis, particularly chronic pouchitis, can be difficult. […] Medical treatment of pouchitis is largely empiric, and only a few small randomized, placebo-controlled trials have been conducted. […] To date, there were no FDA-approved agents for pouchitis or other pouch disorders. […] A multidisciplinary approach involving gastroenterologists and colorectal surgeons, together with a team of GI pathologists and GI radiologists is advocated.

• #3 Pouchitis: Clinical Features, Diagnosis, and Treatment | IJGM

  https://www.dovepress.com/pouchitis-clinical-features-diagnosis-and-treatment-peer-reviewed-fulltext-article-IJGM

  Pouchitis can be classified based on aetiology, duration, clinical course, and response to antibiotic therapy. Accurate diagnosis and classification is the key factor for an adequate management, and exclusion of secondary causes of pouchitis is pivotal. […] Diagnosis CD of the pouch can occur at a distance from surgery with an increasing cumulative incidence over time. A recent study reported that cumulative incidence was 7.5% at 5 years postoperatively and gradually increased to 17.7% and 33.0% at 10 and 20 years. […] Patients with pouchitis may have a variable clinical presentation; pouchitis should be suspected in patients with increased stool frequency and liquidity, urgency, abdominal cramps, night-time fecal seepage, pelvic pressure, tenesmus, or incontinence. Since these symptoms are not specific to pouchitis, it is also required the exclusion of other diagnoses by history, laboratory evaluation, endoscopy and biopsy with histology and, in some cases, abdominal/pelvic imaging. Accurate diagnosis and classification are important for appropriate management.

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