<prompt> Risk factors for malignant change in an asymptomatic patient with a gallbladder polyp on ultrasound include all of the following exceptAge 60 yearsRapid increase in size of polypSize of polyp 5mmAssociated gallstones  <response>: Risk factors for carcinoma Gallbladder Gallstones 3cm Procelain gallbladder Anomalous pancreaticobiliary junction Choledochal cysts Adenomatous polyps Primary sclerosing cholangitis Obesity Salmonella typhi infection Ref: Sabiston 20th edition Pgno : 1512 