title: Urothelial carcinoma arising from an ovarian mature cystic teratoma.
abstract: OBJECTIVE
  Ovarian mature cystic teratomas with malignant transformation are rare, and squamous cell carcinoma is the most common pathological entity. Among these malignant transformations, urothelial cell carcinoma is rare.
  
  
  METHODS
  We report a woman presenting with a huge pelvic cystic mass, favoring a right ovarian mature cystic teratoma with malignant transformation, based on magnetic resonance imaging, who was successfully treated with surgery.
  
  
  CONCLUSIONS
  The final pathology confirmed concomitant malignant transformation of urothelial carcinoma.
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
authors.forename: Hui-Yu
authors.initials: HY
authors.lastname: Chuang
authors.affiliation: Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
authors.forename: Yi-Ting
authors.initials: YT
authors.lastname: Chen
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
authors.forename: Tak-Loi
authors.initials: TL
authors.lastname: Mac
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
authors.forename: Yu-Chieh
authors.initials: YC
authors.lastname: Chen
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
authors.forename: Hung-Sheng
authors.initials: HS
authors.lastname: Chen
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung City, Taiwan.
authors.forename: Wan-Shan
authors.initials: WS
authors.lastname: Wang
authors.affiliation: Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan. Electronic address: tsaieing@yahoo.com.
authors.forename: Eing-Mei
authors.initials: EM
authors.lastname: Tsai
mesh_terms: D002295:Carcinoma, Transitional Cell / Q000209:etiology / Q000473:pathology* / Q000601:surgery; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D033162:Incidental Findings; D007813:Laparotomy / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D010051:Ovarian Neoplasms / Q000175:diagnosis / Q000209:etiology / Q000473:pathology* / Q000601:surgery; D010052:Ovariectomy / Q000379:methods; D017698:Postmenopause; D018570:Risk Assessment; D013724:Teratoma / Q000175:diagnosis / Q000473:pathology*; D016896:Treatment Outcome; D001749:Urinary Bladder Neoplasms / Q000209:etiology / Q000473:pathology* / Q000601:surgery
keywords: malignant transformation; teratoma; urothelial carcinoma