When an aneurysm occurs in the vessels carrying blood to the legs and arms, it is called a peripheral arterial aneurysm.
Peripheral arterial aneurysms are more common in the legs than the arms, and are most frequently found in the femoral or popliteal arteries. Patients with abdominal aortic aneurysms are at a much higher risk for developing peripheral arterial aneurysms.
As is the case with abdominal aortic aneurysms , peripheral arterial aneurysms rarely display symptoms. They are usually discovered during imaging tests such as ultrasound, CT scans, or MRI being performed for other conditions.
Peripheral arterial aneurysms typically do not rupture. They are, however, susceptible to embolization—dislodgement of the clot, which causes an obstruction of a major artery. For this reason, peripheral arterial aneurysms should be treated promptly; otherwise, a severe reduction in blood flow can occur, threatening the viability of the affected leg.
Peripheral arterial aneurysms are always treated with vascular or endovascular surgery. There are several surgical methods that can be used, including exclusion and bypass, interposition grafting, or insertion of a covered stent.