[Polypoid lesions of the gallbladder].

26 cases of polypoid lesions of the gallbladder are reported. 19 were benign lesions, among them, there were 12 (63%) cholesterol polyp, 4 adenoma, 1 inflammatory polyp, and 2 others. 95% of benign lesions were less than 1 cm in diameter, 63% of which were less than 0.5 cm in diameter, 15 cases were multiple lesions; all cases were not associated with gallstones. 7 cases were carcinoma of the gallbladder, of which, 5 were more than 1 cm in diameter, 2 were less than 1 cm which were carcinoma in situs; 3 were associated with gallstones. The accuracy of preoperative diagnosis of polypoid lesions of the gallbladder made by B-mode ultrasonography, cholecystography, CT, endoscopic ultrasonography were 84%, 53%, 80% and 75% respectively. It is concluded that preoperative diagnosis of polypoid lesions on the gallbladder mainly depends on the B-mode ultrasonography; the lesions less than 0.5 cm in diameter should not be treated by operation for the time being; the lesions between 0.5-1 cm should be followed up by B-mode ultrasonography; the operation may be considered if stones present; the lesions more than 1 cm should be resected since malignancy could not be excluded.