title: [A case of colonic collision tumor (adenocarcinoma and neuroendocrine carcinoma)].
abstract: Collision tumors of the colon are rare. A 54-year-old man was referred to our hospital for the evaluation of hematochezia. Colonoscopy demonstrated the presence of about 3 cm sized mass in the rectosigmoid junction. After surgical resection, the colonic lesion was histologically composed of two discrete lesions: adenocarcinoma in the superficial layer and poorly differentiated neuroendocrine carcinoma in the deeper layer. We report this case of colonic collision tumor (adenocarcinoma and neuroendocrine carcinoma) with a review of the literature.
authors.affiliation: Department of Internal Medicine, Good Samsun Hospital, Busan, Korea.
authors.forename: Dong Wan
authors.initials: DW
authors.lastname: Kim
authors.forename: Sang Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Yoon
authors.forename: Tae Yung
authors.initials: TY
authors.lastname: Jun
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Lee
authors.forename: Yang Jin
authors.initials: YJ
authors.lastname: Kim
authors.forename: Ho Yung
authors.initials: HY
authors.lastname: Kim
authors.forename: Jin Sook
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000473:pathology; D015703:Antigens, CD / Q000378:metabolism; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism; D018278:Carcinoma, Neuroendocrine / Q000175:diagnosis* / Q000473:pathology; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D003113:Colonoscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D016708:Synaptophysin / Q000378:metabolism; D014057:Tomography, X-Ray Computed
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; C062279:CD6 antigen; D016708:Synaptophysin