Following is an exception to Courvoisier's law:: (A) Cancer of ampulla, (B) Cancer of pancreas, (C) Cancer of bile duct, (D) Primary oriental cholangiohepatitis causing stones in the CBD.
Answer is D. Primary oriental cholangiohepatitis causing stones in the CBD Exceptions to Courvoisier's law: Double impaction - one stone in CBD and stone in cystic duct. Periampullary carcinoma in a patient who has undergone cholecystectomy. Primary oriental cholangiohepatitis causing stones in the CBD (gall bladder is normal in these cases).