Following is an exception to Courvoisier's law:
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).
Cancer of ampulla
Cancer of pancreas
Cancer of bile duct
Primary oriental cholangiohepatitis causing stones in the CBD.