• Visish M Srinivasan, Patrick J Karas, Anish N Sen, Jared S Fridley, Stephen R Chen, and Shankar P Gopinath.
• Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA.
• World Neurosurg. 2017 Feb 1; 98: 868.e1-868.e4.

BackgroundPseudoaneurysms of scalp arteries have been reported in rare cases after iatrogenic injury; however, they are far more commonly seen after traumatic injuries. They are usually associated with the superficial temporal artery; however, there have been a few reports of psuedoaneurysms of the occipital artery (OA).Case DescriptionWe present a unique case of an OA pseudoaneurysm presenting with delayed postoperative hemorrhage after a retrosigmoid craniotomy. The pseudoaneurysm was treated by coil embolization.ConclusionsThe patient recovered fully after endovascular embolization. Other treatment options for pseudoaneurysms of facial, temporal, and scalp arteries include surgical clipping/trapping with excision, Hunterian ligation, or direct compression. Pseudoaneurysms of extracranial scalp arteries are rare and most often caused by traumatic compression of the artery against a bony ridge. Despite their rarity, pseudoaneurysms secondary to iatrogenic injury to extracranial arteries should be considered in the differential diagnosis in patients presenting with delayed incisional pain, redness, and swelling.Copyright © 2016 Elsevier Inc. All rights reserved.

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