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Evanescent colitis in the young adult: a new entity?

Abstract Five cases thought to represent a new disease entity, evanescent colitis, are presented. Clinically, the cases are characterized by the youth of the patient, diarrhea that is often bloody, and rapid regression of symptoms without therapy. Barium enema findings indicate segmental involvement, spasm, “thumbprinting,” and superficial ulceration. All radiographic findings are completely reversible.