This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Precancerous lesion of gallbladder is 
Select and explain. 
A. Procelain gallbladder, B. Mirriz's syndrome, C. Cholesterolosis, D. Acalculous cholecystitis
A: Procelain gallbladder
Answer: A: Procelain gallbladder 
Explanation: 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 : Most(90%) 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