An increased incidence of cholangiocarcinoma is seen in all of the following, EXCEPT:
Predisposing factors for Cholangiocarcinoma are primary sclerosing cholangitis, liver fluke in Asians caused by opisthorchis viverrini and clonorchis sinensis, chronic biliary inflammation and injury caused by alcoholic liver disease, choledocholithiasis, choledochal cysts and caroli's disease. Ref: Harrison's Principles of Internal Medicine, 18th Edition, Chapter 92, Pages 784, 1762-1763; Bailey and Love's Sho Practice of Surgery, 24th Edition, Page 1077.
Liver flukes
Hydatid cyst of liver
Sclerosing cholangitis
Polycystic disease of liver