title: A series of ovarian clear cell and endometrioid carcinoma and their association with endometriosis.
abstract: OBJECTIVE
  To present our department's experience with clear cell carcinoma and endometrioid carcinoma of the ovary, paying particular attention to their relationship with endometriosis and concomitant endometrial pathology.
  
  
  METHODS
  Retrospective review of case records.
  
  
  RESULTS
  From July 1986 to March 1995, 11 patients with clear cell carcinoma and 20 patients with endometrioid carcinoma of the ovary were treated. Of the patients with clear cell carcinoma, five (45%) had associated endometriosis. One patient (9%) also had endometrial adenomatous hyperplasia. Of the 20 cases of ovarian endometrioid carcinoma, four (20%) had endometriosis present during histopathological examination. Six patients (30%) had concomitant endometrial pathology (five cases of endometrial carcinoma and one with adenomatous hyperplasia).
  
  
  CONCLUSIONS
  Our series shows that the clear cell ovarian carcinoma may often be associated with endometriosis, more so than the endometrioid type of ovarian carcinoma. However, the patient with ovarian endometrioid carcinoma may also harbour a concurrent endometrial pathology.
authors.affiliation: Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
authors.forename: S
authors.initials: S
authors.lastname: Chew
authors.forename: K F
authors.initials: KF
authors.lastname: Tham
authors.forename: S S
authors.initials: SS
authors.lastname: Ratnam
mesh_terms: D018262:Adenocarcinoma, Clear Cell / Q000209:etiology / Q000473:pathology*; D000328:Adult; D018269:Carcinoma, Endometrioid / Q000209:etiology / Q000473:pathology*; D003937:Diagnosis, Differential; D004715:Endometriosis / Q000150:complications / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009367:Neoplasm Staging; D010049:Ovarian Diseases / Q000209:etiology / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000209:etiology / Q000473:pathology; D012189:Retrospective Studies