title: Primary carcinoid tumor arising in a mature cystic teratoma of the ovary: a case report.
abstract: OBJECTIVE
  To present an extremely rare case of a primary carcinoid tumor arising in a mature cystic teratoma of the ovary. Malignant transformation of mature cystic teratoma is an uncommon complication occuring in approximately 1-3% of patients with mature cystic teratoma.
  
  
  METHODS
  A 54-year-old woman presented with abdominal swelling and abnormal uterine bleeding. Physical examination revealed a smooth, non-painful, 8-9 cm diameter mass in the right anterior pelvis which was diagnosed histologically as carcinoid tumor arising in a mature cystic teratoma. The patient underwent a total abdominal hysterectomy with bilateral salpingo-oophorectomy and was scheduled for surveillance CT of the abdomen and pelvis at 3-monthly intervals.
  
  
  CONCLUSIONS
  This case adds to the rare reports in the literature of a carcinoid of low malignant potential occurring in a mature cystic teratoma. The treatment for early-stage ovarian carcinoid tumors confined to one ovary is surgery alone and excellent outcomes can be expected in these cases.
authors.affiliation: Department of Medical Oncology, Okmeydam Research and Training Hospital, Istanbul, Turkey. neseguney@hotmail.com
authors.forename: N
authors.initials: N
authors.lastname: Guney
authors.forename: T
authors.initials: T
authors.lastname: Sayilgan
authors.forename: D
authors.initials: D
authors.lastname: Derin
authors.forename: D
authors.initials: D
authors.lastname: Ozcan
mesh_terms: D002276:Carcinoid Tumor / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology*; D013724:Teratoma