Digital single-operator cholangioscopy for biliary stricture after cadaveric liver transplantation

Figure 4 A neoplasm in donor bile duct. A: Magnetic resonance cholangiopancreatography image shows stricture between anastomosis and hilus region; B: Endoscopic retrograde cholangiopancreatography image shows guidewire failed to pass through the stricture; C: Cholangioscopic image shows the neoplasm with a red surface in the donor bile tract; D: Pathological sections of the neoplasm show many identical lymphocytes with distinct atypia.