title: Benign teratoma in an 85-year-old woman.
abstract: BACKGROUND
  In women over the age of 50, a mature cystic teratoma is reportedly likely to change into a malignant form. A mature cystic teratoma that remained in a benign form in a very old woman is a rare event. We report a case of a benign cystic teratoma, which is the oldest in Japan.
  
  
  METHODS
  An 85-year-old Japanese woman with a pelvic mass measuring 8.90x5.81 cm by ultrasonography was referred to our Department for detailed. Transvaginal ultrasonography, magnetic resonance imaging, and serum concentrations of tumor markers led to a diagnosis of a mature cystic teratoma. Histological findings postoperatively confirmed the presence of a mature cystic teratoma.
  
  
  CONCLUSIONS
  This case report describes a mature cystic teratoma which is the second oldest case reported in the world. We reconfirmed that a mature cystic teratoma in elderly women is not frequent, but does occur.
authors.affiliation: Department of Obstetrics and Gynecology, Shimane Medical University, Izumo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Shinno
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Kurioka
authors.forename: K
authors.initials: K
authors.lastname: Miyazaki
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000951:Antigens, Neoplasm / Q000097:blood; D018394:CA-125 Antigen / Q000097:blood; D018395:CA-19-9 Antigen / Q000097:blood; D002272:Carcinoembryonic Antigen / Q000097:blood; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D015843:Serpins; D013724:Teratoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014463:Ultrasonography
chemical_list: D000951:Antigens, Neoplasm; D018394:CA-125 Antigen; D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen; D015843:Serpins; C051072:squamous cell carcinoma-related antigen