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Findings on barium study of the colon in tuberculosis and Crohn's disease. A: Barium enema showing tubercular strictures (arrows) of the colon; B: Barium enema demonstrating skip lesions affecting descending and transverse colon as ulcers with areas of narrowing in a patient with Crohn's disease (CD); C: Deep ulcers with double tracking of sigmoid colon in a patient with CD (arrows).
