Sarcoma on the inguinal aorta generally refers to femoral artery aneurysm, and the disease is mainly related to trauma, atherosclerosis, arterial inflammatory disease, infection and other factors. 1. Trauma: mostly occurs in young patients. For the groin part has been stabbed, contusion or femoral artery puncture, intubation and other patients, easy to induce pseudo-femoral aneurysm. 2. Atherosclerosis: it occurs mostly in middle-aged and old people, and is accompanied by high blood pressure, coronary artery sclerotic heart disease, etc. It belongs to true aneurysm. 3. Inflammatory arterial diseases: patients with aortitis, Kawasaki disease, white stuff syndrome, etc. may form femoral aneurysms due to aggravation of their conditions, which involve the femoral artery system. 4. Infection: when patients have infections such as Mycobacterium tuberculosis, bacteria, syphilis, etc., it can cause irritation or damage to the wall of femoral artery through blood circulation, thus leading to femoral artery aneurysm. In addition to the above factors, vascular degeneration caused by long-term smoking and congenital defects in the middle layer of the artery can also cause femoral artery aneurysms. It is recommended that the patient undergoes further detailed examination in order to clarify the cause of the disease and then take treatment measures according to the doctor’s instructions.