Results: Univariate regression showed that CT findings of gallbladder distention greater than 4.0 cm (odds ratio [OR], 2.87; p <0.001), decreased mural enhancement (OR 4.61; p <0.001), mural striation (OR 10.23; p <0.001), and intraluminal membranes (OR 25.63; p <0.001), hyperdense wall (OR 2.54; p <0.001) were significantly more common in gangrenous cholecytitis.