Pseudoaneurysm of the superficial temporal artery: a complication of botulinum toxin injection.

Pseudoaneurysms of the superficial temporal artery (STA) must be considered in the differential diagnosis of masses of the lateral forehead and temporal fossa. Although the first reported case of a temporal artery aneurysm was by Thomas Bartholin in 1740, this lesion receives scant mention in the plastic and maxillofacial surgical literature. A history of recent blunt trauma or surgery to the forehead combined with a pulsatile bruit should direct the physician to this diagnosis. A case of pseudoaneurysm arising from the frontal branch of the left STA 2 months after Botox injection is presented. The patient underwent embolization of the STA with Onnix. A similar case was previously reported once in the world literature.