True Aneurysm of the Superficial Temporal Artery

True aneurysms of the superficial temporal artery are rare in contrast to false aneurysms of the superficial temporal artery. We report a case of a true aneurysm that developed spontaneously in an HIV patient. The patient was treated with surgical excision of the aneurysm with an uneventful recovery. Histology revealed a true aneurysm. Clinical presentation and treatment as well as a review of the literature are presented.