title: [Pancreaticoduodenal lymph node metastasis of neuroendocrine carcinoma of unknown primary associated with duodenal carcinoma].
abstract: A 73-year-old man was admitted with bloody stool. Duodenoscopy showed a hemorrhagic ulceration in the duodenum on the side opposite to the papilla of Vater. Abdominal CT demonstrated a well-defined hypervascular mass, adjacent to the lesion of the duodenum. Although as duodenal GIST was diagnosed, histologic examination for frozen sections during the procedure revealed tubular adenocarcinoma of the duodenum and pancreaticoduodenal lymph node metastasis of neuroendocrine carcinoma. He underwent a subtotal stomach-preserving pancreaticoduodenectomy. Clinicopathologically, the neuroendocrine carcinoma of the pancreaticoduodenal lymph node was considered to be metastasis from an unknown primary lesion.
authors.affiliation: Department of Surgery, Nippon Medical School, Japan. junji0821@nms.ac.jp
authors.forename: Junji
authors.initials: J
authors.lastname: Ueda
authors.forename: Takayuki
authors.initials: T
authors.lastname: Aimoto
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Makoto
authors.initials: M
authors.lastname: Hiroi
authors.forename: Kazuya
authors.initials: K
authors.lastname: Yamahatsu
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Hayakawa
authors.forename: Zenya
authors.initials: Z
authors.lastname: Naito
authors.forename: Eiji
authors.initials: E
authors.lastname: Uchida
mesh_terms: D000230:Adenocarcinoma / Q000556:secondary* / Q000601:surgery; D000368:Aged; D018278:Carcinoma, Neuroendocrine / Q000556:secondary*; D004379:Duodenal Neoplasms / Q000473:pathology* / Q000601:surgery; D004386:Duodenum / Q000473:pathology; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D009382:Neoplasms, Unknown Primary; D010179:Pancreas / Q000473:pathology; D016577:Pancreaticoduodenectomy