• Nauman S Chaudhry, Brandon G Gaynor, Shahrose Hussain, Paul D Dernbach, and Mohammad A Aziz-Sultan.
• Department of Neurosurgery, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.
• World Neurosurg. 2017 Jun 1; 102: 697.e1-697.e4.

BackgroundAneurysms of the external carotid artery represent approximately 2% of cervical carotid aneurysms, with the majority being traumatic pseudoaneurysms. Given the paucity of literature available for guidance, the diagnosis, treatment, and follow-up of such lesions are completely individualized.Case DescriptionWe report an 83-year-old woman with an 8-week history of headache in the occipital region, transient episode of gait disturbance, and pulsatile tinnitus on the right. She had no history of trauma, surgery, autoimmune disease, or infection. Physical examination revealed a pulsatile mass tender to palpation in the right occipital scalp. The mass was surgically excised, and histopathological diagnosis of a true aneurysm was made. Postoperatively, the patient's symptoms resolved; however, 1 month after the procedure, she developed occipital neuralgia, which was successfully treated with a percutaneous nerve block.ConclusionsTo the best of our knowledge, this is the second reported case of a true aneurysm of the occipital artery in a patient with no history of trauma. The clinical examination, diagnosis, and treatment are discussed and the literature is reviewed for previously reported cases.Copyright © 2017 Elsevier Inc. All rights reserved.

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