title: Cholangiocarcinoma Secondary to Primary Sclerosing Cholangitis in Explanted Livers: A Single-Center Study in the South of Iran.
abstract: BACKGROUND
  Primary sclerosing cholangitis (PSC) is a chronic disease, characterized by chronic inflammation and fibrosis of bile duct epithelial cells. This is a significant contributory factor to the development of malignancy, most commonly cholangiocarcinoma (CCA), which is the second most common malignant liver tumor.
  
  
  OBJECTIVE
  For the first time in Iran, we intend to describe our experience with cases of PSC, with and without CCA, in explanted livers, and compare our results with those found in other areas of the world.
  
  
  METHODS
  The study population comprised 181 individuals with a diagnosis of PSC who had undergone liver transplantation in the main liver transplant center of Iran, the largest center of hepatobiliary surgery in the south of that country, over a 3-year period between 2012 and 2014. All explanted livers, with and without CCA, were evaluated.
  
  
  RESULTS
  Of the 181 patients, 16 were found to have CCA, two of whom had been diagnosed after pathologic study of the explanted livers. Therefore it appeared that 8.8% of the patients with PSC in our center had developed CCA before liver transplantation.
  
  
  CONCLUSIONS
  A comparison of our results with those obtained from other centers in both Western and Asian countries (which reported CCA in 3.6% - 36.5% of patients with PSC), shows that the incidence of CCA in the patients we studied is intermediate.
authors.affiliation: Department of Pathology, Shiraz University of Medical Sciences, Shiraz, IR Iran; Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Bita
authors.initials: B
authors.lastname: Geramizadeh
authors.affiliation: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Roshanak
authors.initials: R
authors.lastname: Ghavvas
authors.affiliation: Department of Hepatobiliary and Liver Transplant Surgery, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Kurosh
authors.initials: K
authors.lastname: Kazemi
authors.affiliation: Department of Hepatobiliary and Liver Transplant Surgery, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Shamsaeefar
authors.affiliation: Department of Hepatobiliary and Liver Transplant Surgery, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Saman
authors.initials: S
authors.lastname: Nikeghbalian
authors.affiliation: Department of Hepatobiliary and Liver Transplant Surgery, Shiraz University of Medical Sciences, Shiraz, IR Iran.
authors.forename: Seyed-Ali
authors.initials: SA
authors.lastname: Malekhosseini
keywords: Cholangiocarcinoma; Cirrhosis; Liver Transplantation; Primary Sclerosing Cholangitis