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