Benign giant-cell tumor of the common bile duct: A case report

Figure 1 Preoperative images showing the tumor (arrows). A: Non-enhanced upper-abdominal coronal computed tomography demonstrating a 1.2-cm mass in the middle of the common bile duct; B: Intravenous administration of contrast medium showing mild enhancement of the tumor; C: T2–weighted magnetic resonance image showed that the tumor had a relatively well-defined border; D: Magnetic resonance cholangiopancreatography image revealed stenosis of the common bile duct.