What test?: Crohn's is diagnosed by history, with abnormal physical, confirmed by xray, other radiology, endoscopy/colonoscopy/capsule endoscopy, biopsy. Blood tests for ibd mostly help to distinguish between "indeterminate" colitis (is it Crohn's or ulcerative colitis); diagnosis is not generally based on those results alone. Ibs is different from Crohn's and uc (ibd); both can be separate or coexist in pt.
Answered 2/18/2015
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Need biopsies: There are blood tests that can help distinguish between crohn's , ulcerative colitis and ibs but these are not the most dependable. The gold standard is colonoscopy with biopsies.
Answered 5/19/2013
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