<prompt> Courvoisers law exception isDouble impactionPortal lymphadenopathyPeriampullary CANone  <response>: Ans. a Double impactionRef: Long cases in Surgery RRMAs per law In obstructive jaundice if GB is palpable it is due to Cancer and if not, palpable it is due to stonesExceptions to Courvoisier law: Double impaction of stone- One at Cystic Duct and another at CBD Where GB is palpable Hilar Cholangiocarcinoma Where GB is not palpable 