title: Signet ring cell carcinoma in a polyp of the colon. A case report of a six-year-old boy.
abstract: Undifferentiated adenocarcinoma of the colon occurring in a 6-year-old boy was presented. The tumor characterized by the signet ring cell appearance developed in a polyp of the descending colon. The signet ring cell carcinoma is in general a rare morphologic form of colonic carcinoma. According to our review of the literature there have been described 16 patients under 10 years of age with colonic or rectal carcinoma, disclosing 2 cases of undifferentiated or signet ring cell carcinoma including the present case. In children, mucin producing adenocarcinoma is the most predominant type of colonic carcinoma, and 48% of the colonic carcinomas are of signet ring cell carcinoma in children under 17 years of age.
authors.affiliation: Department of Pathology, Shizuoka Children's Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hamazaki
authors.forename: S
authors.initials: S
authors.lastname: Kono
authors.forename: J
authors.initials: J
authors.lastname: Mimaya
authors.forename: A
authors.initials: A
authors.lastname: Ishihara
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000473:pathology*; D002648:Child; D003110:Colonic Neoplasms / Q000473:pathology*; D003111:Colonic Polyps / Q000473:pathology*; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*