title: [A case demonstrating knot formation at the upper end of a ureteral stent].
abstract: A 37-year old man underwent extracorporeal shock wave lithotripsy for left renal stones after placing a ureteral stent (6 Fr multilength stent). Three months later the stent could not be extracted because of knot formation at the upper end. We performed ureterotomy and removed the stent.
authors.affiliation: The Department of Urology, Machida Municipal Hospital.
authors.forename: Naoya
authors.initials: N
authors.lastname: Kondo
authors.forename: Yasumasa
authors.initials: Y
authors.lastname: Yoshino
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Shiono
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Hasegawa
mesh_terms: D000328:Adult; D006801:Humans; D008096:Lithotripsy / Q000009:adverse effects* / Q000295:instrumentation; D008297:Male; D011859:Radiography; D015607:Stents / Q000009:adverse effects*; D014513:Ureter; D014514:Ureteral Calculi / Q000000981:diagnostic imaging / Q000628:therapy