In young patients with symptoms of classic<unk><unk><unk>  (IBS), additional invasive investigations such as endoscopy are not required and increase patient dissatisfaction. However, endoscopic evaluation is performed in difficult cases of IBS where history is unclear but the physical examination is suggestive of the diagnosis. All IBS patients with alarm features must undergo endoscopic evaluation. Moreover, colonoscopy must be considered in patients aged more than 50 years as part of routine colon cancer screening. Sigmoid colon biopsies and duodenal biopsies are required for exclusion of microscopic colitis, Crohn's disease, and celiac disease. Anorectal manometry is a diagnostic technique used to rule out obstructive defecation (pelvic-floor dyssynergia).
Irritable bowel syndrome other diagnostic studies
Crohn's disease other diagnostic studies
Ulcerative colitis other diagnostic studies
Allergic colitis other imaging findings
Ischemic colitis other diagnostic studies
Ischemic colitis risk factors
Ulcerative colitis risk factors
Meckel's diverticulum other imaging findings