title: Plastic and biodegradable stents for complex and refractory benign esophageal strictures.
abstract: Endoscopic stent placement is a well-accepted and effective alternative treatment modality for complex and refractory esophageal strictures. Among the currently available types of stents, the partially covered self-expanding metal stent (SEMS) has a firm anchoring effect, preventing stent migration and ensuring effective covering of a narrowed segment. However, hyperplastic tissue reaction driven by the uncovered mesh may prevent easy and safe stent removal. As an alternative, a fully covered SEMS decreases the recurrence of dysphagia caused by hyperplastic tissue ingrowth; however, it has a high migration rate. Likewise, although a self-expanding plastic stent (SEPS) reduces reactive hyperplasia, the long-term outcome is disappointing because of the high rate of stent migration. A biodegradable stent has the main benefit of not requiring stent removal in comparison with SEMS and SEPS. However, it still has a somewhat high rate of hyperplastic reaction, and the long-term outcome does not satisfy expectations. Up to now, the question of which type of stent should be recommended for the effective treatment of complex and refractory benign strictures has no clear answer. Therefore, the selection of stent type for endoscopic treatment should be individualized, taking into consideration the endoscopist's experience as well as patient and stricture characteristics.
authors.affiliation: Department of Internal Medicine, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Ham
authors.affiliation: Department of Internal Medicine, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Gwang Ha
authors.initials: GH
authors.lastname: Kim
keywords: Endoscopic treatment; Esophagus; Stents; Stricture