title: Primary renal artery choriocarcinoma causing secondary renovascular hypertension.
abstract: BACKGROUND
  Choriocarcinoma is a rare primary germ cell tumour of the ovary composed of cyto- and syncytotrophoblast cells. Most of the choriocarcinomas are normally arising in the gestational trophoblast, gonads and, less frequently, mediastinum, pineal gland and retroperitoneum.
  
  
  METHODS
  We report a case of primary choriocarcinoma of renal artery causing secondary renovascular hypertension in a 28 years old woman of reproductive age, presenting with abdominal pain, minimal vaginal bleeding and a delayed menstrual period.
  
  
  CONCLUSIONS
  Non-gestational choriocarcinomas, are histologically related to the pregnancy related gestational choriocarcinomas. These two subtypes may have to be differentiated according the clinical and radiological findings and DNA analysis may be used for this purpose as well. In many studies, authors have stated that nongestational choriocarcinoma diagnosis could be implemented in situations where the presence of a pregnancy could not be considered like the prepubertal period.
  
  
  CONCLUSIONS
  Choriocarcinoma should as well be considered among the possibilities in the differential diagnosis of the causes for secondary hypertension, especially within a picture of pregnancy of unknown location, albeit being one of the rarest.
authors.affiliation: Department of Obstetrics and Gynecology, Bagcilar Education and Research Hospital, Bagcilar, Istanbul, Turkey. Electronic address: tanerusta74@yahoo.com.
authors.forename: Taner Abdullah
authors.initials: TA
authors.lastname: Usta
authors.affiliation: Department of Obstetrics and Gynecology, Bagcilar Education and Research Hospital, Bagcilar, Istanbul, Turkey.
authors.forename: Tolga
authors.initials: T
authors.lastname: Karacan
authors.affiliation: Department of Obstetrics and Gynecology, Bagcilar Education and Research Hospital, Bagcilar, Istanbul, Turkey.
authors.forename: Eser
authors.initials: E
authors.lastname: Ozyurek
authors.affiliation: Department of Obstetrics and Gynecology, Liv Hospital, Ulus, Istanbul, Turkey.
authors.forename: M Murat
authors.initials: MM
authors.lastname: Naki
authors.affiliation: Department of Cardiovascular Surgery, Istanbul University Cerrahpasa Medical Faculty, Istanbul, Turkey.
authors.forename: Suat Nail
authors.initials: SN
authors.lastname: Omeroglu
authors.affiliation: Department of Obstetrics and Gynecology, Istanbul University Cerrahpasa Medical Faculty, Istanbul, Turkey.
authors.forename: Fuat
authors.initials: F
authors.lastname: Demirkiran
keywords: Choriocarcinoma; Pregnancy of unknown location; Primary renal artery; Secondary renovascular hypertension