<prompt> All of the following are risk factors of CA GB exceptGallstonesAdenomyomatosisProcelain gallbladderCholedochal cyst  <response>: Adenomyomatosis has no malignant potential 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 :1510 