[Palilloma and papillary tumor of the gallbladder].

Frequently confused with adenomas or pseudopolyps of the gall bladder, papillomas are rare tumours defined as vegetations covered with an epithelium of gall bladder type in the centre of which is a thin connective tissue axis. They are usually recognised on lyon histological examination of the operative specimen. The uncertainty concerning their course makes them a potentially malignant lesion as shown by the two cases reported here including one personal case concerning a carcinoma situated close to a benign papillomatous lesion. The frequent coexistence with lithiasis which may induce their malignant transformation reinforces the indications for surgery for gall stones.