title: A case report of retroperitoneal extrahepatic hepatocellular carcinoma presented with elevated level of Alpha fetoprotein.
abstract: BACKGROUND
  High level of alpha-fetoprotein is usually associated with testis cancer or hepatocellular carcinoma a primary tumor of the liver.
  
  
  METHODS
  We report the case of a 72-year-old male patient with chronic renal failure who presented with a high alpha-fetoprotein (AFP) level and a retroperitoneal mass, which was subsequently diagnosed to be an extrahepatic hepatocellular carcinoma.
  
  
  CONCLUSIONS
  A retroperitoneal mass with elevated AFP level and no detected liver lesions is not always caused by a testicular cancer.
authors.affiliation: Department of Internal Medicine, Recep Tayyip Erdogan University Training and Research Hospital, Rize, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Yuce
authors.affiliation: Department of Nephrology, Recep Tayyip Erdogan University Training and Research Hospital, Rize, Turkey.
authors.forename: Oz
authors.initials: O
authors.lastname: Sahin
authors.affiliation: Department of Pathology, Recep Tayyip Erdogan University Training and Research Hospital, Rize, Turkey.
authors.forename: R
authors.initials: R
authors.lastname: Bedir
authors.affiliation: Department of Internal Medicine, Recep Tayyip Erdogan University Training and Research Hospital, Rize, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Ayaz
authors.affiliation: Department of Radiology, Recep Tayyip Erdogan University Training and Research Hospital, Rize, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Durakoglugil
keywords: alpha fetoprotein; ectopic tissue; extrahepatic hepatocellular carcinoma; testis cancer