title: Isolated iliac artery aneurysms in patients with or without previous abdominal aortic aneurysm repair.
abstract: BACKGROUND
  Isolated iliac artery aneurysms (IAA) in patients with or without previous abdominal aortic aneurysm (AAA) repair are rare. We wanted to compare the presentation, distribution, treatment, outcome and patterns of subsequent aneurysm formation in these patients.
  
  
  METHODS
  We retrospectively reviewed patients with isolated IAA over a 10-year period. Patients with primary isolated IAA (group 1) were compared with patients who presented with IAA after previous AAA repair (group 2).
  
  
  RESULTS
  There were 23 patients in each group. Demographics and comorbidities were similar. No aneurysms were detected outside of the iliac system in group 1; 22% of patients in group 2 had other aneurysms. The mean time after AAA repair to IAA diagnosis was 8.8 +/- 3.2 years for operated on patients. The in-hospital mortality was 0% for elective cases and 50% for emergency cases for both groups. Three patients in group 2 (13%) developed new aneurysms during follow-up, whereas the only new aneurysm in group 1 was a contralateral IAA.
  
  
  CONCLUSIONS
  Patients with new IAA after AAA repair have a greater tendency to develop further aneurysms in other sites, synchronously or metachronously. The time to detection of new IAA after AAA repair is at least 5 years in most cases. In both groups, a quarter to a third of patients present with rupture, with a resultant mortality of 30% to 50%, whereas those operated on electively have minimal morbidity and almost no mortality.
authors.affiliation: Department of Vascular Surgery, State University of New York at Buffalo, USA.
authors.forename: H H
authors.initials: HH
authors.lastname: Dosluoglu
authors.forename: M L
authors.initials: ML
authors.lastname: Dryjski
authors.forename: L M
authors.initials: LM
authors.lastname: Harris
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D017542:Aneurysm, Ruptured / Q000175:diagnosis / Q000503:physiopathology; D017544:Aortic Aneurysm, Abdominal / Q000150:complications / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation; D002423:Cause of Death; D017558:Elective Surgical Procedures; D004621:Embolization, Therapeutic; D004630:Emergencies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D017543:Iliac Aneurysm / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology / Q000601:surgery / Q000628:therapy; D008297:Male; D012189:Retrospective Studies; D015607:Stents; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency