Significantly Elongated Sagging Gallbladder Can Mimic Intestine in Hepatobiliary Scintigraphy and Cause False-Positive Interpretation for Acute Cholecystitis

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Nonvisualization of the gallbladder in hepatobiliary scintigraphy is usually caused by cystic duct obstruction and is a reliable sign for acute cholecystitis. Hepatobiliary scintigraphy is known to be more sensitive than ultrasonography for the diagnosis of acute cholecystitis. However, false-positive interpretation of hepatobiliary scintigraphy can occur. We present a case in which a significantly elongated drooping gallbladder mimicked bowel activity and caused false interpretation of hepatobiliary scintigraphy.

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