Evaluation of the GORE® VIABAHN® Endoprosthesis for the Treatment of Popliteal Artery Aneurysm (PAA)

Inclusion Criteria: Inclusion to the study requires the patient: 1. Received a GORE® VIABAHN® Endoprosthesis to treat a popliteal artery aneurysm 2. Had a symptomatic aneurysm or asymptomatic aneurysm (≥ 2 cm diameter) of the popliteal artery, or the presence of mural thrombus (\< 2 cm) in the popliteal artery; 3. Was 18 years of age or older at the time of the treatment; 4. Had an elective popliteal artery aneurysm procedure; 5. Has provided Informed Consent, personally or through lawful representation as determined by applicable local regulations and state law Exclusion Criteria: Prior to or at the time of implant the patient is / has: 1. Bilateral popliteal artery aneurysms with initial treatment on the same day; 2. Thrombotic occlusion of the popliteal artery or PAA; 3. Marfan syndrome or Ehlers-Danlos syndrome; 4. Unable to tolerate antiplatelet therapy; 5. Thrombophilia requiring long term anticoagulation; 6. Known allergies to the GORE® VIABAHN® Endoprosthesis components; 7. Enrolled in another investigational drug or medical device trial where participation may have affected the outcome or treatment of the subject in the popliteal artery aneurysm study with the GORE® VIABAHN® Endoprosthesis or had previous surgery for the popliteal artery aneurysm in the study limb.