[Gallbladder adenoma with carcinoma in situ. Apropos of a case].

The case reported involved a large villous adenoma of the gallbladder with areas of carcinoma in situ, investigated by ultrasonography and CT. These imaging methods highly sensitive in the detection of such lesions are virtually non specific in terms of their nature and only the large size of the lesion should lead to suspicion of malignant change.