Superficial Temporal Artery Pseudoaneurysm: Diagnosis and Preoperative Planning with CT Angiography

Summary: We report the use of CT angiography in the diag-nosis and preoperative planning of a superficial temporal artery pseudoaneurysm. A 50-year-old man presented with a pulsatile preauricular mass 4 weeks after undergoing pteri-onal craniotomy for aneurysm repair. CT angiography re-vealed a 2.5-cm pseudoaneurysm arising from the posterior margin of the right superficial temporal artery at the inferior margin of the craniotomy incision. To our knowledge, this is the first reported case showing the usefulness of CT angiog-raphy alone in the diagnosis and characterization of a super-ficial temporal artery pseudoaneurysm. Superficial temporal artery (STA) pseudoaneurysms are uncommon and usually are the result of trauma to the frontotemporal region. The appearance of a pul-satile preauricular mass chronologically related t