title: Endovascular tubular stent-graft placement for isolated iliac artery aneurysms.
abstract: OBJECTIVE
  To evaluate the safety, efficacy, and mid-term outcomes of endovascular tubular stent-graft placement for repair of isolated iliac artery aneurysms (IAAs).
  
  
  METHODS
  Between January 2002 and March 2010, 20 patients (7 women and 13 men; mean age 74 years) underwent endovascular repair of 22 isolated IAAs. Two patients underwent endovascular repair for bilateral aneurysms. Ten para-anastomotic aneurysms (45%) developed after open abdominal aortic aneurysm (AAA) repair with an aorto-iliac graft, and 12 were true aneurysms (55%). Eleven straight and 11 tapered stent-grafts were placed. Contrast-enhanced computed tomography (CT) was performed to detect complications and evaluate aneurysmal shrinkage at week 1, 3, 6, and 12 months and once every year thereafter. Non-contrast-enhanced CT was performed in seven patients with chronic kidney disease.
  
  
  RESULTS
  All procedures were successful, without serious complications, during the mean (range) follow-up period of 746 days (47-2651). Type II endoleak not requiring treatment was noted in one patient. The mean (SD) diameters of the true and para-anastomotic aneurysms significantly (p < 0.05) decreased from 42.0 (9.3) to 36.9 (13.6) mm and from 40.1 (13.0) to 33.6 (15.8) mm, respectively; the mean (SD) shrinkage rates were 15.1% (20.2%) and 18.9% (22.4%), respectively. The primary patency rate was 100%, and no secondary interventions were required. Four patients (21%) developed transient buttock claudication, and one patient (5%) developed colorectal ischaemia, which was treated conservatively.
  
  
  CONCLUSIONS
  Endovascular tubular stent-graft placement for the repair of isolated IAAs is safe and efficacious. Tapered stent-grafts of various sizes are required for accurate placement.
authors.affiliation: Department of Radiology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan. okabone@gmail.com
authors.forename: Takuya
authors.initials: T
authors.lastname: Okada
authors.forename: Masato
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kitagawa
authors.forename: Ryota
authors.initials: R
authors.lastname: Kawasaki
authors.forename: Yoshikatsu
authors.initials: Y
authors.lastname: Nomura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Okita
authors.forename: Kazuro
authors.initials: K
authors.lastname: Sugimura
authors.forename: Koji
authors.initials: K
authors.lastname: Sugimoto
mesh_terms: D000368:Aged; D000792:Angiography; D019917:Blood Vessel Prosthesis Implantation / Q000379:methods*; D003287:Contrast Media; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D017543:Iliac Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D008297:Male; D011474:Prosthesis Design; D015607:Stents; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014654:Vascular Patency
chemical_list: D003287:Contrast Media