Removal of a migrated fully covered metal biliary stent by cholangioscope-assisted inversion technique
31 August 2018 (eFirst)
Proximal biliary stent migration is a rare and unwanted complication. Various endoscopic methods have been used to remove migrated biliary stents, including the use of direct cholangioscopy for plastic biliary stent migration    . Here, we describe a case of cholangioscopy-assisted removal of a proximally migrated fully covered metal biliary stent by inversion technique.
A 78-year-old woman with metastatic pancreatic head adenocarcinoma initially presented to an outside facility with jaundice due to biliary compression. Endoscopic retrograde cholangiopancreatography (ERCP) with placement of two fully covered self-expandable metal stents (FCSEMS) was performed at the outside facility. Several days later, the patient presented to our facility with persistent jaundice. Serum bilirubin was 20 g/dL. A repeat ERCP was then performed at our facility.
Initial fluoroscopy showed two biliary stents in the common duct. Endoscopic view, however, revealed only one stent emanating from the ampulla. Cholangiogram showed that that the second stent had migrated upward into the common hepatic duct (CHD) adjacent to the nonmigrated stent. The nonmigrated stent was removed, and cholangioscopy using SpyGlass DS Direct Visualization System (Boston Scientific Corp., Marlborough, Massachusetts, USA) was performed to visualize the migrated stent ([Fig. 1]). The migrated stent was in the oblique position, partially obstructing the CHD. In order to remove the migrated stent, SpyBite Biopsy Forceps (Boston Scientific Corp.) via cholangioscopy was used to grasp the proximal portion of the migrated stent and invert it inward while pulling the stent downward ([Fig. 2], [Fig. 3], [Video 1]). A Radial Jaw 4 Pediatric Biopsy Forceps (Boston Scientific Corp.,) was then used to fully remove the migrated stent ([Fig. 4]).
Video 1 Cholangioscope-assisted removal of proximally migrated fully covered metal biliary stent. The stent was grasped at its proximal end by SpyBite Biopsy Forceps (Boston Scientific Corp., Marlborough, Massachusetts, USA) and inverted while being pulled downward. Pediatric forceps then removed the inverted stent.
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