title: A collision tumor composed of adenocarcinoma and malignant lymphoma in the remnant stomach after pancreatoduodenectomy: report of a case.
abstract: The occurrence of a collision tumor in the stomach, consisting of adenocarcinoma and malignant lymphoma, is extremely rare. We report herein the case of a patient who had undergone a pancreatoduodenectomy for bile duct cancer 5 year earlier, in whom an ulcerating tumor of the remnant stomach developed and grew rapidly within 5 months. Surgical exploration revealed a tumor in the remnant stomach, multiple liver metastases, and multiple lymph node metastases. Total resection of the remnant stomach was performed, and pathological examination revealed a collision tumor consisting of adenocarcinoma and malignant lymphoma. The patient died of liver metastases and lymph node metastases 7 months after his second operation. The coexistence of both adenocarcinoma and malignant lymphoma of the remnant stomach and the etiology of this unusual combination, never previously reported, is discussed.
authors.affiliation: Department of Surgery, Kitakyushu Municipal Medical Center, 2-1-1 Bashaku, Kokurakita-ku, Kitakyushu 802-0077, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Manabe
authors.forename: K
authors.initials: K
authors.lastname: Nishihara
authors.forename: Y
authors.initials: Y
authors.lastname: Kurokawa
authors.forename: Y
authors.initials: Y
authors.lastname: Hattanda
authors.forename: S
authors.initials: S
authors.lastname: Toyoshima
authors.forename: S
authors.initials: S
authors.lastname: Takeda
authors.forename: R
authors.initials: R
authors.lastname: Abe
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D001650:Bile Duct Neoplasms / Q000601:surgery; D017809:Fatal Outcome; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary; D008207:Lymphatic Metastasis; D008223:Lymphoma / Q000473:pathology*; D008297:Male; D016609:Neoplasms, Second Primary / Q000473:pathology*; D016577:Pancreaticoduodenectomy; D013274:Stomach Neoplasms / Q000473:pathology*