Direct Choledochoscopic Visualization of Living Clonorchis sinensis in the Biliary Tract

A 73-year-old man was admitted with right upper quadrant abdominal pain of one week's duration.In November 2023, he suffered from choledocholithiasis and underwent endoscopic retrograde cholangiopancreatography at another hospital, which was reportedly successful.During the current admission, magnetic resonance cholangiopancreatography revealed multiple common bile duct stones and edematous thickening of the gallbladder wall, consistent with acute cholecystitis (Figure 1a).