Acute gangrenous cholecystitis: radionuclide diagnosis.

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Abstract
Radionuclide hepatobiliary imaging is a useful procedure for the diagnosis of acute cholecystitis. Visualization of the gallbladder essentially rules out acute cholecystitis. Nonvisualization suggests acute cholecystitis but may also be associated with chronic gallbladdar disease or other conditions. Five patients in whom a rim of increased parenchymal liver activity was seen adjacent to the gallbladdar fossa are described. All 5 patients had acute gangrenous cholecystitis. The time of increased activity appears to be a useful secondary sign of acute cholecystitis.