Traumatic pseudoaneurysm of the axillary artery is a rare sequela of injury to shoulder region. We report here a unique case of delayed presentation of axillary artery pseudoaneurysm after a blunt injury, clinically mimicking soft tissue tumor without evidence of gross bony injury. The gentleman presented after six months of injury with a progressively growing mass in left axillary region and neurological deficit. Ultimate management of the lesion was surgical resection and Saphenous vein graft interpositioning. Unfortunately the lack of subsequent neurological recovery parallels some of the findings in the literature, from cases where decompression of the brachial plexus was not undertaken soon enough.
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