Abstract
Question: A 73-year-old-woman with nontuberculous mycobacterial pulmonary disease who was receiving antibiotic treatment presented with a 2-day history of progressive abdominal pain. Physical examination revealed mild tenderness in the right upper quadrant, without guarding or rebound. Laboratory tests were unremarkable except the C-reactive protein level was 2.9 mg/dL. Computed tomography of the abdomen showed grape-like clusters of air pockets within the colonic wall. Colonoscopy revealed multiple, variably sized, submucosal nodules in the ascending and transverse colon, with some protruding and almost entirely obstructing the colonic lumen (Figure A and B; Video 1). Narrow-band imaging magnified endoscopy revealed a normal surface pattern with dilated blood vessels and spots without irregularities (Figure C; Video 1).
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