Abstract
A 71-year-old man with left lower limb paralysis caused by poliomyelitis in childhood has used an axillary crutch. He complained of numbness in his left forearm. Computed tomography, revealed a left brachial artery aneurysm and acute brachial artery occlusion. He was referred to our department and underwent an urgent thrombectomy and bypass surgery. Axillary-brachial artery bypass grafting was performed using the great saphenous vein, and the aneurysm could be excluded. A year after the operation, the patient's upper arm remain well perfused. Most brachial artery aneurysms are attributable to trauma ; however, this patient developed the aneurysm secondary to the use of a crutch.