title: Focus of signet ring cell carcinoma in an adenoma of the sigmoid colon.
abstract: A case of a pedunculated adenomatous polyp of the sigmoid colon was found to have a primary focus of signet ring cell carcinoma. Histologic examination of the medium-sized polyp was consistent with an adenoma to carcinoma sequence for signet ring cell carcinoma of the colon, similar to that for the common adenocarcinomas.
authors.affiliation: Department of Medicine, Boston Medical Center, Boston, Mass, USA.
authors.forename: M
authors.initials: M
authors.lastname: Tandon
authors.forename: M
authors.initials: M
authors.lastname: Sostek
authors.forename: M A
authors.initials: MA
authors.lastname: Klein
mesh_terms: D000236:Adenoma / Q000473:pathology*; D018279:Carcinoma, Signet Ring Cell / Q000473:pathology*; D012809:Colon, Sigmoid / Q000473:pathology*; D003110:Colonic Neoplasms / Q000473:pathology*; D003113:Colonoscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*