Department of Diagnostic Ultrasound and ME Sapporo Medical University
Common bile duct dilatation, Endoscopic ultrasonography, Floating gallbladder, Torsion of gallbladder
Although floating gallbladder occurs in approximately 4% of the population, it is seldom diagnosed with ultrasonography. Here we report a case of a floating gallbladder in which the abdominal ultrasonogram showed echo-free space in front of the portal vein and inferior vena cava. It was first misdiagnosed as a dilated common bile duct. Endoscopic ultrasonography and other imaging methods were useful in making a correct diagnosis. It is important to rule out a floating gallbladder when diagnosing a dilated common bile duct.