Occlusion of the brachial artery by thrombus dislodged from a traumatic aneurysm of the anterior humeral circumflex artery. The successful treatment of a brachial artery occlusion caused by a chronic embolizing aneurysm of the anterior humeral circumflex artery is described. In the case of embolizing axillary artery aneurysms, the best therapy is resection of the aneurysm followed by distal thromboembolectomy and vascular reconstruction by a saphenous vein segment. Prosthetic material should be reserved as a second choice. In this particular case successful therapy consisted of ligation of the anterior humeral circumflex artery proximal and distal to the aneurysm, resection of the aneurysm, and transcubital thromboembolectomy. 