Print OverviewA popliteal artery aneurysm is an irregular bulge that occurs in the wall of the artery located behind the knee joint. It is a type of lower extremity aneurysm.Products & ServicesA Book: Mayo Clinic Family Health Book, 5th EditionNewsletter: Mayo Clinic Health Letter — Digital EditionShow more products from Mayo Clinic SymptomsA popliteal artery aneurysm may not cause any noticeable symptoms. The first symptom may be pain the lower leg that occurs with walking (claudication). Other signs and symptoms of a popliteal artery aneurysm include: Knee pain Lower leg pain Swelling behind the knee Pulsing sensation behind the knee CausesAn aneurysm is a ballooning in a weak spot in an artery wall. Many different things can cause the popliteal artery wall to become weak, including: Clogged arteries (atherosclerosis) High blood pressure Wear and tear of the popliteal artery due to repetitive use of the knee joint Weakening of the artery wall Risk factorsPopliteal artery aneurysms are rare. They are more common in men than in women. Popiteal artery aneurysms often occur in men with abdominal aortic aneurysm (AAA), a swelling of the wall of the body's main artery (aorta). Anyone diagnosed with popliteal artery aneurysm should be screened for AAA. Other risk factors for popliteal artery aneurysm include: Increasing age High blood pressure (hypertension) Smoking Narrowing of a heart valve (stenotic disease) Having three or more aneurysms anywhere in the body ComplicationsComplications of popliteal artery aneurysm include blood clots (thrombosis) and, rarely, rupture of the aneurysm. Thrombosis of a popliteal artery aneurysm can cause a severe lack of blood flow (ischemia) in the lower leg, which may result in loss of the limb. Sudden leg ischemia can cause the following signs and symptoms: A change in skin color in the affected area No pulse behind the knee Skin in the affected area feels cold Numbness in the leg Inability to move the foot The risk of popliteal artery aneurysm rupture is low. PreventionSmoking and high blood pressure (hypertension) increase the risk of blood vessel (vascular) problems that can lead to popliteal artery and other aneurysms. Following a heart-healthy lifestyle — such as not smoking, eating a nutritious diet and getting regular exercise — can help prevent heart disease and blood vessel damage. By Mayo Clinic Staff Popliteal artery aneurysm care at Mayo Clinic Request an appointment Diagnosis & treatment Feb. 23, 2022 Print Show references Sidawy AN, et al., eds. Lower extremity aneurysms. In: Rutherford's Vascular Surgery and Endovascular Therapy. 9th ed. Elsevier; 2019. https://www.clinicalkey.com. Accessed Nov. 15, 2021. Cameron AM, et al. Femoral and popliteal artery aneurysm. In: Current Surgical Therapy. 13th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Nov. 15, 2021. Braswell-Pickering EA. Allscripts EPSi. Mayo Clinic. Dec. 9, 2021. Peripheral arterial aneurysms. Merck Manual Professional Version. https://www.merckmanuals.com/professional/cardiovascular-disorders/peripheral-arterial-disorders/peripheral-arterial-aneurysms. Accessed Nov. 1, 2021. Reed AB. Popliteal artery aneurysm. https://www.uptodate.com/contents/search. Accessed Nov. 15, 2021. van Laarhoven CJHCM, et al. Systematic review of the co-prevalence of arterial aneurysms within the vasculature. European Journal of Vascular and Endovascular Surgery. 2021; doi:10.1016/j.ejvs.2020.10.002. Leake AE, et al. Meta-analysis of open and endovascular repair of popliteal artery aneurysms. Journal of Vascular Surgery. 2017; doi:10.1016/j.jvs.2016.09.029. Related Products & Services A Book: Mayo Clinic Family Health Book, 5th Edition Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic Popliteal artery aneurysmSymptoms&causesDiagnosis&treatmentDoctors&departmentsCare atMayoClinic Advertisement Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. Advertising & Sponsorship Policy Opportunities Ad Choices Mayo Clinic Press Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press. Mayo Clinic on Incontinence - Mayo Clinic PressMayo Clinic on IncontinenceThe Essential Diabetes Book - Mayo Clinic PressThe Essential Diabetes BookMayo Clinic on Hearing and Balance - Mayo Clinic PressMayo Clinic on Hearing and BalanceFREE Mayo Clinic Diet Assessment - Mayo Clinic PressFREE Mayo Clinic Diet AssessmentMayo Clinic Health Letter - FREE book - Mayo Clinic PressMayo Clinic Health Letter - FREE book CON-20248747 Patient Care & Health Information Diseases & Conditions Popliteal artery aneurysm