title: [A case of primary retroperitoneal mucinous cystadenocarcinoma].
abstract: We encountered a case of primary retroperitoneal mucinous cystadenocarcinoma with ovarian-type stroma, an extremely rare condition. The patient was a 56-year-old woman with complaints of diarrhea, nausea, and abdominal fullness. Abdominal ultrasound revealed a nodular multi-cystic mass in the left lower quadrant of the abdomen. Subsequent contrast-enhanced CT and MRI determined it to be of retroperitoneal origin, consistent with a mucinous cystadenocarcinoma. Numerous small nodules were confirmed during the operation around the tumor suggesting local dissemination of the cancer and a left partial colectomy that included these nodules was performed. On histological examination, mucinous fluid was found trapped inside the cavity and poorly differentiated adenocarcinoma was observed in the solid portions. The ovarian-type stroma was confirmed in the layer beneath the epithelial lining and eventually a final diagnosis of mucinous cystadenocarcinoma was reached.
authors.affiliation: Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan. tamaki_ichiya@yahoo.co.jp
authors.forename: Tamaki
authors.initials: T
authors.lastname: Ichiya
authors.forename: Masafumi
authors.initials: M
authors.lastname: Nomura
authors.forename: Shinya
authors.initials: S
authors.lastname: Mitsui
authors.forename: Hayato
authors.initials: H
authors.lastname: Shida
authors.forename: Fukuo
authors.initials: F
authors.lastname: Komaba
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Kin
authors.forename: Kei
authors.initials: K
authors.lastname: Yane
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsui
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nishimori
authors.forename: Kunihiko
authors.initials: K
authors.lastname: Tsuji
authors.forename: Jonhon
authors.initials: J
authors.lastname: Kang
authors.forename: Manabu
authors.initials: M
authors.lastname: Osanai
authors.forename: Akio
authors.initials: A
authors.lastname: Katanuma
authors.forename: Kuniyuki
authors.initials: K
authors.lastname: Takahashi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Maguchi
authors.forename: Toshiya
authors.initials: T
authors.lastname: Shinohara
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Shimizu
authors.forename: Hirotoshi
authors.initials: H
authors.lastname: Akita
mesh_terms: D018282:Cystadenocarcinoma, Mucinous / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000473:pathology*