Malpositioned biliary endoprosthesis: retrieval using a vascular balloon catheter.

Abstract
Successful function of an indwelling biliary endoprosthesis [in patients] requires precise initial positioning relative to the stricture site. Delayed failures may occur as a result of migration either proximally or distally. A method for the retrieval of a distally displaced endoprosthesis using a vascular balloon-dilatation catheter is described.