title: Mucinous adenocarcinoma of the intestinal type arising from mature cystic teratoma of the ovary: a rare case report and review of the literature.
abstract: BACKGROUND
  Mature cystic teratomas (MCTs) are the most common germ cell tumors of the ovary. Malignant tranformation occurs in 1-2% of these neoplasms. Although most of the malignancies arising from MCTs are squamous cell carcinomas, adenocarcinoma of the gastrointestinal type is extremery rare. We herein present a case of adenocarcinoma of the intestinal type arising from a MCT.
  
  
  METHODS
  A 49-year-old female underwent surgery for a left ovarian tumor. The histology of the cyst walls revealed a MCT with a few hair shafts and a squamous layer, while another part of the tumor showed adenocarcinoma of the intestinal type. Five years after surgery, she is alive without disease.
authors.affiliation: Department of Obstetrics and Gynecology, Osaka Medical College, 2-7, Daigaku-machi, Takatsuki, Osaka, 569-8686, Japan. gyn044@poh.osaka-med.ac.jp.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Takai
authors.forename: Masanori
authors.initials: M
authors.lastname: Kanemura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawaguchi
authors.forename: Satoe
authors.initials: S
authors.lastname: Fujiwara
authors.forename: Saha
authors.initials: S
authors.lastname: Yoo
authors.forename: Yoshimichi
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tsunetoh
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Terai
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamada
authors.forename: Masahide
authors.initials: M
authors.lastname: Ohmichi