[Adenomyomatosis of the gallbladder in CT]

The computed tomographic findings of adenomyomatosis of the gallbladder are described in nine patients, including all main types of this disease. Diagnosis was confirmed by typical cholecystographic findings in all cases, as well as by histological evaluation in three cases. Only in the fundal type were the intramural diverticula well visualized on CT. Although in the other types the Rokitansky-Aschoff sinuses were not clearly shown by CT, when performed without application of a cholegraphic agent, the computed tomographic findings nevertheless appeared to be characteristic. In the area involved, layering of the thickened gallbladder wall, associated with irregular ill-defined borders of the inner layer, appears to be typical. Visualization of these findings was improved following enhancement by intravenous contrast media.