Colonic Leiomyoma (Stromal Tumor)
Left: Submucosal leiomyoma, an incidental finding in a 54 year-old woman undergoing colonoscopy for evaluation of abdominal pain and occult bleeding.
Center: Small, smooth polypoid lesion in a 44 year-old man with occult bleeding (likely from hemorrhoids). Histologically this lesion was a leiomyoma.
Right: Smooth polyp with a shallow cleft or furrow, in the distal rectum of a 61 year-old woman. The lesion was a submucosal leiomyoma.
Left: 65 year-old woman with a history of colonic polyps. Colonoscopy revealed this 5-6 mm polypoid lesion in the cecum, shown here across the lumen from the ileocecal valve, which histologically proved to be a leiomyoma.
Right: 78 year-old woman with a large, benign-appearing submucosal polypoid lesion in the transverse colon. Biopsies were consistent with leiomyoma.
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