Brachial artery aneurysms and arteriovenous malformations (AVM) are limb-threatening vascular anomalies. This patient presented with a bilobed brachial artery aneurysm in the antecubital fossa proximally to an AVM arising from the dorsal interosseous and ulnar arteries that had been treated with endovascular embolization, leaving the hand solely supplied by the radial artery. The aneurysm continued to increase in size and imaging revealed concomitant thrombus. A femoral vein interposition graft was used to repair the aneurysm, and postoperatively, the patient retained full left arm function.
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