<prompt> Popliteal aneurysm-All are true except-Presents as a swelling behind the kneePresents with symptoms due to complicationSurgery is indicated in case of complicationUncommon among peripheral aneurysm  <response>: Occur in conjunction with aortic aneurysm in 40 cases Most isolated iliac aneurysm involve common iliac artery 70 and internal iliac artery 20 Multiple iliac aneurysms occur in most patients and are bilateral in 33 casesEtiology Occur in association with atherosclerosis Can also occur in pregnancy in absence of atherosclerosis as well as in Marfan and Ehlers-Danlos syndromes, Kawasaki disease, Takayasus arteritis, cystic medial necrosis and arterial dissectionClinical Features More common in males, right and left sides are equally involved Symptoms are caused by compression of adjacent pelvic structures bladder, colon, ureter, rectum, lumbosacral nerves and pelvic vein Most common iliac aneurysms can be palpated on abdominal exam whereas internal iliac artery aneurysm are more readily palpated on rectal examinationTreatment Operative mortality rate in patients with ruptured iliac aneurysm is 40. Iliac aneurysms 3.5 cm are repaired if possible.Minimum Size for Surgery AIPF: All India Police ForceAbdominal Aortic Aneurysm 5.5 cm Iliac aneurysm 3.5 cm PoplitealFemoral aneurysm 2.0 cm 