<prompt> Precancerous lesion of gallbladder isProcelain gallbladderMirrizs syndromeCholesterolosisAcalculous cholecystitis  <response>: Procelain Gallbladder Characterized by extensive encrustation of GB wall. Term Procelain gallbladder has been used to emphasise the blue discolouration and brittle consistency of GB wall at surgery Clinical features : Most90 are associated with gallstones Mean age of patients is 54 years 38-74 years Patients are usually asymptomatic and the condition is usually found incidentally on plain abdominal radiographs, sonograms or CT images High frequency association 10 is with GB adenocarcinoma Surgery should not be delayed even if patient is asymptomatic, because the occurrence of carcinoma is remarkably high Ref: Sabiston 20th edition Pgno :1512 