A case of cytomegalovirus enterocolitis diagnosed by the double-balloon enteroscopy.

A 73-year-old woman presented with massive bloody stools while undergoing hospitalization for multiple myeloma. Colonoscopy and transrectal double-balloon enteroscopy revealed multiple punched-out ulcers throughout the entire colon and in the distal ileum. Cytomegalovirus was detected in the biopsy specimens of both the colonic and ileal mucosa and in the peripheral blood, which lead the diagnosis of CMV enterocolitis. The patient's gastrointestinal bleeding was temporarily improved by the administration of ganciclovir, though she died thereafter due to progression of the primary disease. We herein report the effectiveness of transrectal double-balloon enteroscopy for the diagnosis of cytomegalo-virus enterocolitis.