Double contrast barium enema in Crohn's disease and ulcerative colitis

Double contrast barium enema examinations in 24 patients with Crohn's disease of the colon and 29 patients with ulcerative colitis were reviewed without knowledge of the clinical diagnosis. The radiologic diagnosis of Crohn's disease agreed with the clinical diagnosis in 98% of patients. In this condition the most common radiologic findings were discontinuous or asymmetric disease (88%) and discrete ulcers (67%) often on a normal mucosa. The latter are characteristic of early Crohn's disease and may enable the radiologist to be the first to suggest the diagnosis, particularly when both sigmoidoscopy and small bowel examination are normal. Of the patients with ulcerative colitis, a positive radiologic diagnosis was made in 83% on the basis of a granular mucosal pattern (79%) and continuous distal involvement (86%). The high accuracy of the double contrast technique, especially in Crohn's disease, and the relative specificity of the signs that it can demonstrate suggest that this is the preferred examination in the radiologic evaluation of inflammatory bowel disease.
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