Character of lmaging and Histopathology in Polypoid Lesions of Gallbladder

One bandred and sixty two patients with polypoid lesions of the gallbladder （PLG）proved by operation and histopathology from june l986 to january 1993 were studied,of the 162cases, 140 （86.42）were benign, 22 （l3.58%）were malignant. Single lesions accounted for 90.91% of malignant lesions. 95.05% of carcinoma were more than 1 cm in diamater P＜001.There were 63.64%of malignant lesions coexisted with gallstones. The adenomyoma, papillomaand adenoma with atypical hyperplasias have malignant potential. The sensitivity of ultrasonogra- phy（US）, oral cholecystography in detecting PLG was 96.30%and 55.56%respeetively. Whenthe PLG exceeds 1 cm in diamate, single in number and associated with gallstones, surgical tre-atment must be considered.