title: Long-term outcome of popliteal artery aneurysms after ligation and bypass.
abstract: OBJECTIVE
  After exclusion of popliteal artery aneurysms (PAAs) through bypass surgery, there is a risk of persistent flow through collaterals and growth of the excluded aneurysmal sac. This study was conducted to evaluate this risk at long-term follow-up.
  
  
  METHODS
  Sixty-five PAAs treated by proximal and distal ligation and bypass grafting with reversed autologous vein in 52 patients (1998-2010) were retrospectively reviewed.
  
  
  RESULTS
  Mean follow-up was 41 months (range, 1-144 months). Five aneurysms showed residual flow (8%). One of these aneurysms had increased in size, 36 months postoperatively. This aneurysm underwent an embolization procedure after which no flow or further enlargement was demonstrated.
  
  
  CONCLUSIONS
  In this study, the risk of persistent flow in a PAA excluded by proximal and distal ligation and bypass is low. Still, considering this risk and its possible complications, follow-up by duplex ultrasound in all patients until up to more than 10 years postoperatively is recommended.
authors.affiliation: Department of Surgery, Meander Medical Center, Amersfoort, Netherlands. jep.vrijenhoek@meandermc.nl
authors.forename: Joyce E P
authors.initials: JE
authors.lastname: Vrijenhoek
authors.forename: Albert J C
authors.initials: AJ
authors.lastname: Mackaay
authors.forename: Sandra A P
authors.initials: SA
authors.lastname: Cornelissen
authors.forename: Frans L
authors.initials: FL
authors.lastname: Moll
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D003097:Collateral Circulation; D004621:Embolization, Therapeutic; D006801:Humans; D053208:Kaplan-Meier Estimate; D008026:Ligation; D008875:Middle Aged; D009426:Netherlands; D011150:Popliteal Artery / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D012039:Regional Blood Flow; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D012501:Saphenous Vein / Q000637:transplantation*; D013997:Time Factors; D016896:Treatment Outcome; D018615:Ultrasonography, Doppler, Color; D058017:Vascular Grafting / Q000009:adverse effects