[Nonvisualization of the gallbladder lumen by sonography]

Out of 12 000 sonographic examinations of the abdomen in 211 cases the gallbladder was not visualized. The retrospective analysis of 41 patients revealed in 75% gallstones, in 15% space occupying lesions (4 carcinomas, 1 abscess, 1 sludge). In 10% the sonography gave a false positive result. The reasons are discussed.