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World J Gastrointest Endosc. Sep 16, 2012; 4(9): 432-433
Published online Sep 16, 2012. doi: 10.4253/wjge.v4.i9.432
Published online Sep 16, 2012. doi: 10.4253/wjge.v4.i9.432
Mucosal hyperplasia in an uncovered portion of partially covered metal stent
Kazumichi Kawakubo, Hiroyuki Isayama, Naoki Sasahira, Hirofumi Kogure, Koji Miyabayashi, Kenji Hirano, Minoru Tada, Kazuhiko Koike, Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
Author contributions: Kawakubo K, Isayama H, Sasahira N, Kogure H, Miyabayashi K, Hirano K and Tada M made substantial contributions to conception and design, acquisition of data, and analys is of data; Kawakubo K drafted the article; Isayama H and Sasahira N revised it critically for important intellectual content; Koike K finally approved of the version to be published.
Correspondence to: Kazumichi Kawakubo, MD, Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655, Japan. kkawakubo-gi@umin.ac.jp
Telephone: +81-3-38155411 Fax: +81-3-38140021
Received: February 25, 2011
Revised: September 3, 2011
Accepted: September 12, 2012
Published online: September 16, 2012
Revised: September 3, 2011
Accepted: September 12, 2012
Published online: September 16, 2012
Abstract
Covered self-expandable metal stents were developed to overcome tumor in-growth through the metal mesh. Stent migration is one of their malfunctions. Recently, the partially covered wallflex stent (PCWS) was developed with flared ends to prevent migration However, difficulty has been reported in its removal. We describe the removal of a PCWS embedded in mucosal hyperplasia at the uncovered proximal flared end, visualized by using SpyGlass cholangioscopy.