title: Malignant ureteral obstruction: preliminary results of treatment with metallic self-expandable stents.
abstract: Self-expandable metal stents 7 mm in diameter were percutaneously implanted into 13 ureters in 10 patients with malignant ureteral obstruction not amenable to double-J stent placement. In nine ureters, one stent was placed, and in four ureters, two overlapping stents were placed. Primary reconstitution of ureteral patency was achieved in all ureters. After 1-2 weeks, four ureters showed a urothelial reaction encroaching on the lumen of the ureter, and a double-J stent was placed coaxially. One ureter was occluded by urothelial hyperplasia 4 weeks after stent placement, and a double-J stent was therefore placed. One ureter was occluded 8 months after stent placement by distal tumor overgrowth. The other ureters showed no signs of obstruction during a follow-up of 3-14 (average, 5.8) months. Peristalsis was preserved at both ends of the stent in all ureters. The use of this stent alone or in combination with a double-J stent alleviated upper urinary tract obstruction and avoided external drainage in all patients.
authors.affiliation: Department of Radiology, University Hospital of Graz, Austria.
authors.forename: F
authors.initials: F
authors.lastname: Flueckiger
authors.forename: J
authors.initials: J
authors.lastname: Lammer
authors.forename: G E
authors.initials: GE
authors.lastname: Klein
authors.forename: K
authors.initials: K
authors.lastname: Hausegger
authors.forename: A
authors.initials: A
authors.lastname: Lederer
authors.forename: D
authors.initials: D
authors.lastname: Szolar
authors.forename: K
authors.initials: K
authors.lastname: Tamussino
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications*; D015641:Radiography, Interventional; D015607:Stents; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*; D014567:Urography
chemical_list: D008670:Metals