An aneurysm is an abnormal dilation of an artery. The femoral artery is located in the groin. Femoral artery aneurysms are rare and are most often found in older patients and are more commonly associated with the following conditions: smoking, diabetes, and/or hardening of the arteries (atherosclerosis). They may develop after cardiac catheterization. Most patients do not have any symptoms and this condition is frequently found during a healthcare providers physical examination.