title: Ovarian endometrioid adenocarcinoma arising from endometriosis in a young woman.
abstract: BACKGROUND
  The risk of ovarian cancer increases in women with a long history of ovarian endometriosis, particularly in postmenopausal women. We present here a case of malignant transformation of endometriosis occurring over a short time in a young woman.
  
  
  METHODS
  The 27-year-old woman underwent laparoscopic cystectomy and was diagnosed with left ovarian endometrioma with an accompanying high level of serum CA125 (734.6 U/mL). Fourteen months later, she underwent cytoreductive surgery for her ovarian cancer. Histological examination revealed endometrioid adenocarcinoma with transitions between endometriosis and adenocarcinoma. She was diagnosed as having stage IIIc of ovarian cancer with paraaortic lymphnode involvement.
  
  
  CONCLUSIONS
  We suggest that endometrial cyst of the ovary associated with high levels of serum CA125 should be managed with special care even in a young woman.
authors.affiliation: Department of Obstetrics and Gynecology, Tottori University School of Medicine, 36-1 Nishimachi Yonago, 6838504, Japan.
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Tagashira
authors.forename: Muneaki
authors.initials: M
authors.lastname: Shimada
authors.forename: Junzo
authors.initials: J
authors.lastname: Kigawa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Iba
authors.forename: Naoki
authors.initials: N
authors.lastname: Terakawa
mesh_terms: D000328:Adult; D018269:Carcinoma, Endometrioid / Q000209:etiology* / Q000473:pathology; D004715:Endometriosis / Q000150:complications* / Q000473:pathology; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000209:etiology* / Q000473:pathology