Fig. 1. Endoscopic ultrasonography (EUS) findings. (A) A 1-cm-sized subepithelial lesion covered by normal duodenal mucosa is observed in the anterior wall of the duodenal bulb. (B, C) EUS using a 20-MHz catheter probe reveals a 0.8×0.6 cm-sized anechoic lesion with hyperechoic suture material (arrow) outside the duodenal wall. (D) Conventional EUS (7.5 MHz) reveals that the anechoic lesion was connected to the common bile duct and had no Doppler flow (arrow).

Fig. 2. Abdominal computed tomography reveals a remnant cystic duct with suture material (arrows). (A) Transverse section view. (B) Coronal section view.