Background: Patients undergoing irreversible electroporation (IRE) for locally advanced pancreatic cancer (LAPC) may experience biliary obstruction owing to inflammation generated by tumor ablation. This study assessed the safety, efficacy, and technical details of endoscopic retrograde cholangiopancreatography (ERCP) for biliary decompression after IRE.
Methods: A single-institution database of patients undergoing IRE for LAPC between 2012 and 2017 was queried for patients requiring post-IRE ERCP. Patients were evaluated along demographic, laboratory, procedural, and outcome measures.
Results: Of 113 patients with LAPC who underwent IRE, 6 (5.3%) required subsequent ERCP for biliary obstruction. A total of 12 ERCPs were performed. Two patients (33%) had duodenal bulb narrowing requiring dilation, and one patient (17%) had a pancreatic head cyst complicating guidewire passage. Biliary cannulation was achieved in all patients in a median time of 30 min. Four patients (67%) underwent sphincterotomy, and 5 (83%) underwent stent placement. Post-procedurally, all showed liver test improvement. None developed pancreatitis. Four patients underwent a 2nd ERCP. All were successful and included stent placement.
Conclusions: For patients with biliary obstruction after IRE, ERCP with sphincterotomy and stent placement can safely relieve this obstruction. Duodenal dilation and careful guidewire manipulation may be required to maximize technical success in these patients.
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