The diagnosis of Crohn's disease can sometimes be challenging, and a number of tests are often required to assist the physician in making the diagnosis. Sometimes even with all the tests the Crohn's does not show itself. A colonoscopy has about a 70% chance of showing the disease and the rest of the tests go down in percentage.  Disease in the small bowel can not be seen through some of the regular tests; for example, a colonoscopy can't get there.
Crohn's disease other diagnostic studies
Ulcerative colitis other diagnostic studies
Irritable bowel syndrome other diagnostic studies
Crohn's disease other imaging findings
Ulcerative colitis risk factors
Crohn's disease differential diagnosis
Allergic colitis other imaging findings
Ischemic colitis risk factors