Off-label use of Lumen-apposing metal stents for treatment of short benign biliary strictures. 2024

Massimiliano Mutignani, and Mario Capasso, and Giulia Bonato, and Francesco Pugliese, and Lorenzo Dioscoridi, and Marcello Cintolo, and Marianna Bravo, and Andrea Palermo, and Irene Cottone, and Edoardo Forti
Digestive and Interventional Endoscopy Unit, Niguarda Hospital, Piazza dell'Ospedale Maggiore 3, 20161, Milan, Italy.

BACKGROUND Endoscopic stenting is the mainstay of treatment for benign biliary strictures. There is a not-negligible rate of recurrence and stent migration. Lumen-apposing metal stents (LAMS) have a unique design with short length, large diameter and wide flanges which make them less prone to migration. OBJECTIVE To describe the intraluminal use of LAMS to treat short benign biliary strictures. METHODS All consecutive patients who underwent bi-flanged LAMS placement for benign biliary strictures, in approximately 6 years, were retrospectively included. Primary outcomes were technical and clinical success; secondary outcomes were number of endoscopic procedures, adverse events evaluation and stricture recurrence during follow-up. RESULTS Seventy patients (35 male, mean age 67) were enrolled; bilio-enteric anastomotic stricture was the most common etiology. Technical and clinical success were 100 % and 85.7 %, respectively. Patients with post-surgical stricture had a higher success rate than patients with non-surgical stricture or with bilio-enteric anastomotic stricture (90.4 %, 86.3 % and 81.4 %, respectively). Adverse events were 12/70 (17.1 %): stent migration was the most frequent (8/70, 11.4 %). Stricture recurrence was found in 10/54 patients (18.5 %). CONCLUSIONS LAMS placement could be safe and effective treatment for short benign biliary strictures in patients in which a significant caliber disproportion between stricture and the duct above was revealed.

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