Koh Kitagawa, MD, from the Center for Gastroenterology, Teine-Keijinkai Hospital, in Sapporo, Japan presents this video case "Tornado effect: accidental removal of a biliary metallic stent on winding around a stent retriever." Our video case describes the accidental removal of a non-covered hilar self-expandable metallic stent(SEMS) placed in a partial “stent-in-stent” manner upon around a …

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