Fig. 1. Abdominal computed tomography findings. (A) Coronal view: a radiopaque lesion on the distal portion of the common bile duct. (B) Axial view: diffusely dilated bile duct from the peripheral to the distal portion.

Fig. 2. Endoscopic findings. (A) Cholangiography showing round and irregular floating filling defects in the dilated common bile duct. (B, C) Multiple, yellow-colored oval objects with brown dots and rims are extracted from the bile duct.

Fig. 3. Microscopic findings of the removed prarasites. (A–C) Flat and elongated parasite, Clonorchis sinensis with an average size of 15 mm. (D) Eggs of C. sinensis.