In this report, 88 cases of gallbladder adenoma collected from Chinese medical literature including the author's own 12 cases were analysed. Canceration was found in 17 (19.3%) cases. Risk factors included multiple and sessile adenoma, tubular adenoma, adenoma of more than 1 cm in diameter, and adenoma coexistent with gallstones. It is the authors' believe that any polypoid neoplasms of the gallbladder of more than 0.5 cm in diameter found by B-mode ultrasonography justify surgical exploration in order not to overlook a possible canceration.