<prompt> True about gallstone diseaseAcute cholecystitis presents with GB PerforationAcute cholecystitis presents with mucosal ulceration of GB80 cases of cholithiasis are symptomaticMucocele of GB contains infected bile  <response>: Acute cholecystitis is related to gallstones in 90-95 of cases In most severe cases, this process can lead to ischemia and necrosis of GB wall5-10 Perforation is not usually seen Ref: Sabiston 20th edition Pgno :1492-1493 