Risk factor for cholangiocarcinoma all except:: (A) Chronic typhoid carrier, (B) Chronic ulcerative colitis, (C) Parasitic infestation, (D) Choledocholithiasis
Answer is D. Choledocholithiasis Risk factors for Choangiocarcinoma - Primary sclerosing cholangitis - Choledochal cyst - Ulcerative colitis - Clonorchis sinensis - Chronic typhoid carriers * Other risk factors - Hepatolithiasis - Biliary enteric anastomosis - Liver flukes - Dietary nitrosamines - Exposure to thorotrast, dioxin Mnemonic 5 C's