title: A case of mixed adenoneuroendocrine carcinoma of the stomach.
abstract: A 71-year-old man who tested positive in a pepsinogen test also underwent upper gastrointestinal endoscopy. A 0-IIc lesion was identified at the posterior wall of the antrum. Biopsy findings indicated endocrine cell carcinoma. The patient underwent distal gastrectomy, and subsequent histopathological examination of the resected specimens showed a moderately differentiated adenocarcinoma (tub2) in the mucosa with transformation to small cell carcinoma in the submucosal and muscle layers. The final diagnosis was of a mixed adenoneuroendocrine carcinoma. We herein describe a case report of this patient with this rare form of gastric carcinoma.
authors.affiliation: Department of Internal Medicine, Engaru Kosei General Hospital.
authors.forename: Momotaro
authors.initials: M
authors.lastname: Muto
authors.forename: Mizue
authors.initials: M
authors.lastname: Muto
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ichiki
authors.forename: Chisato
authors.initials: C
authors.lastname: Ishikawa
authors.forename: Mitsutaka
authors.initials: M
authors.lastname: Inoue
authors.forename: Daisuke
authors.initials: D
authors.lastname: Ishii
authors.forename: Junichi
authors.initials: J
authors.lastname: Goto
authors.forename: Satoshi
authors.initials: S
authors.lastname: Inaba
authors.forename: Takanori
authors.initials: T
authors.lastname: Aoki
authors.forename: Nobuo
authors.initials: N
authors.lastname: Kondo
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000601:surgery; D000368:Aged; D018278:Carcinoma, Neuroendocrine / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000601:surgery; D017024:Chemotherapy, Adjuvant; D005743:Gastrectomy; D005773:Gastroscopy; D006801:Humans; D008297:Male; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000473:pathology / Q000601:surgery