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Genetic and Rare Diseases Information Center (GARD)

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Crohn's disease


* Not a rare disease
Other Names for this Disease
  • Enteritis
  • Granulomatous colitis
  • Granulomatous enteritis
  • Ileitis
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Tests & Diagnosis

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How is Crohn's disease diagnosed?

A variety of tests are used to diagnose and monitor Crohn’s disease. A combination of tests is often needed because some symptoms of the condition are similar to other intestinal disorders such as irritable bowel syndrome and to another type of inflammatory bowel disease (IBD) called ulcerative colitis.[1] Tests used to narrow down the diagnosis may include blood tests, tissue tests, ultrasound, x-rays, CT scan, and/or endoscopy. A proper diagnosis also involves identifying the extent and severity of disease as well as any related complications.[2]
Last updated: 10/15/2012

  1. Crohn's disease. National Digestive Diseases Information Clearinghouse (NIDDC). 2006; Accessed 7/29/2010.
  2. Diagnosing Crohn's Disease and Ulcerative Colitis. Crohn's & Colitis Foundation of America. May 31, 2010; Accessed 10/15/2012.