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Removal of embedded partially covered self-expandable metal stents in endoscopic ultrasound-guided hepaticogastrostomy
Endoscopic ultrasound (EUS)-guided hepaticogastrostomy (HGS) is a widely used procedure. Despite high success rates, reintervention is sometimes needed and can be complicated. Partially covered self-expandable metal stents (PCSEMS) often cause hyperplasia, which can impede stent removal  . We used to use PCSEMS, but now use 6-mm fully covered self-expandable stents (FCSEMS) for ease of reintervention .
The “SEMS-in-SEMS” technique has already been successfully applied for the removal of difficult-to-remove FCSEMS in endoscopic biliary drainage  . We report here the first evidence that the technique for removing an embedded PCSEMS after EUS-HGS, developed from the “SEMS-in-SEMS” technique, is safe and useful.
A 69-year-old woman who had undergone right hepatectomy for cholangiocellular carcinoma was referred to our hospital for treatment of recurrence. At the previous hospital, an EUS-HGS of B2 and B3 with an 8-mm, 10-cm PCSEMS had been performed 1 month earlier because of difficulties in managing endoscopic biliary drainage due to disease recurrence in the hepatic portal region.
The patient showed obstructive jaundice, so we tried to revise the EUS-HGS. We attempted to remove the stents, but failed because of hyperplasia into the stents. We therefore inserted a 10-mm, 7-cm FCSEMS inside the first stent in B2. We also inserted a 10-mm, 8-cm FCSEMS through a mesh gap in the first stent in B3, as if cutting into the first stent ([Fig. 1]; [Video 1]). After 4 months, the patient again experienced obstructive jaundice. We easily removed both B2 and B3 stents with alligator forceps and inserted new plastic stents into each ([Fig. 2]).
Video 1 Removal of an embedded partially covered self-expandable metal stent in an endoscopic ultrasound-guided hepaticogastrostomy using a development of the “SEMS-in-SEMS” technique.
Recently, EUS-HGS has been used not only as an alternative drainage, but also for primary drainage. Methods facilitating reintervention are thus needed. Because the stent on the stomach side is long, reintervention through the end of the stent on the stomach side is difficult. Approaching through a mesh gap in the stent was thus useful. Our technique may make reintervention easier.
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23 September 2020 (online)
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