title: Identical twins with ovarian endometriosis and mucinous borderline tumor: an unusual association.
abstract: OBJECTIVE
  To report a case of monozygotic twins with unilateral ovarian tumors of different histology and character.
  
  
  METHODS
  Case report.
  
  
  METHODS
  Medical center and teaching hospital.
  
  
  METHODS
  A 22-year-old woman with ruptured ovarian endometrioma and her twin with mucinous borderline tumor of the ovary.
  
  
  METHODS
  Ultrasonography, laparoscopic ovarian cystectomy, and salpingo-oophorectomy.
  
  
  METHODS
  Ovarian cystectomy for the twin with endometrioma and examination of the asymptomatic twin.
  
  
  RESULTS
  Diagnosis and treatment of the asymptomatic twin.
  
  
  CONCLUSIONS
  Ovarian tumors present in monozygotic twins may not always be of the same histologic type.
authors.affiliation: Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei, Taiwan.
authors.forename: Ma-Lee
authors.initials: ML
authors.lastname: Ko
authors.forename: Hun-Shan
authors.initials: HS
authors.lastname: Pan
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000150:complications / Q000175:diagnosis* / Q000601:surgery*; D000328:Adult; D004715:Endometriosis / Q000150:complications / Q000175:diagnosis* / Q000601:surgery*; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery*; D010053:Ovary / Q000601:surgery*; D035583:Rare Diseases / Q000175:diagnosis / Q000601:surgery; D014430:Twins, Monozygotic