Mucosal hyperplasia in an uncovered portion of partially covered metal stent

Figure 1 Fluoroscopic image a showing metal stent grasped with a snare. It was impossible to remove the stent.

Figure 2 Fluoroscopic image showing a filling defect at the proximal end of a partially covered Wallflex stent (arrow).

Figure 3 SpyGlass cholangioscopic image showing mucosal hyperplasia in an uncovered portion of a partially covered Wallflex stent.

Figure 4 Biopsy specimen of mucosal hyperplasia showing inflammatory bile duct mucosa without malignancy.