Pulsatile masses are mostly suggestive of vascular lesions or closely related to blood vessels. Imaging examinations such as angiography and blood flow ultrasound can clearly localize, quantify and qualify the diagnosis, and provide detailed information about the blood supply and its relationship with the surrounding great vessels. A pulsating mass on the clavicle is a clinical manifestation of peripheral aneurysm. Peripheral aneurysms are aneurysms that occur in each main artery such as carotid artery and extremity artery. The former is usually caused by atherosclerosis, and its aneurysm wall contains the three-layer structure of the arterial wall, and may be multiple or coexist with aortic aneurysm; the latter is often secondary to arterial trauma (e.g. stabbing injury, arterial puncture), and its aneurysm wall is fibrous tissue, and is mostly solitary. Various infectious factors (e.g., infectious emboli shed during bacterial endocarditis) can also destroy the arterial wall and form a so-called infected aneurysm. Peripheral aneurysms will develop progressively after they occur. Therefore, active surgical treatment should be performed in all cases without contraindications. The traditional surgical method is atherectomy. In small aneurysms, end-to-end anastomosis can be performed directly after resection to reconstruct the artery. For larger aneurysms, if the surrounding adhesions are not serious, the artery can be reconstructed by interposition of an autologous vein or artificial vessel; if the adhesions are serious and the collateral circulation is abundant, the arteries at both ends of the aneurysm can be ligated, the aneurysm can be left open, and then the artery can be bypassed by an artificial vessel or an autologous vein. For pseudoaneurysm, direct repair or patching of the arterial fissure is also possible. For infected aneurysms, effective antibiotic therapy should be given. Some peripheral aneurysms can also be treated with intracavitary isolation, which is less invasive and more superior for those with difficult exposure and severe adhesions.