Abstract

A 59-year-old woman who was known to have large hepatic cysts presented with a positive fecal occult blood test. Her physical examination was unremarkable, and laboratory testing revealed no abnormalities. A double-contrast barium study showed a round, radiolucent area in the descending colon. Colonoscopy revealed a light-red, sessile lesion, about 15 mm in diameter, which consisted of variously-sized nodules covered with white exudate ([Fig. 1]). The rest of the colonic mucosa was unremarkable. When the specimen was biopsied massive bleeding occurred, suggesting that the lesion was hypervascular. Histological examination of the biopsy specimen showed proliferation of capillaries.

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