Nontraumatic, posterior circulation pseudoaneurysm of the basilar artery summit with complete spontaneous resolution: Case report and literature review.

• Type of Material: Article
• Authors: Nefize Turan, Emory University School of Medicine; Shannon Butler, University of Canberra; Theodore C. Larson, III, Centura Health Physician Group Neuroscience and Spine; Alexander Mason, Emory University
• Language: English
• Date: 2017-04-05
• Publisher: Wolters Kluwer - Medknow
• Publication Version: Final Published Version
• Copyright Statement: © 2017 Surgical Neurology International
• License: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported
• Final Published Version (URL): http://dx.doi.org/10.4103/sni.sni_452_16
• Title of Journal or Parent Work: Surgical Neurology International
• ISSN: 2229-5097
• Volume: 8
• Start Page: 50
• End Page: 50
• Keywords: subarachnoid hemorrhage; pseudoaneurysm; Basilar artery; conservative management
• Research Categories: Biology, Neuroscience; Health Sciences, Medicine and Surgery

Abstract

BACKGROUND: Intracranial pseudoaneurysms are rare vascular defects of arterial walls that are classically the result of traumatic injury, iatrogenic causes, or infection. Idiopathic pseudoaneurysms are seen even less frequently and are often related to atherosclerosis. Pseudoaneurysms are most commonly found along the distal wall of the internal carotid artery, however, can occur at any location in the cerebrovascular circulation. Treatment of these arterial defects is often challenging due to their frail nature. CASE DESCRIPTION: A 61-year-old male with a history of hypertension presented with a severe, atypical headache without history of trauma. Computed tomography (CT) and computed tomography angiography (CTA) demonstrated diffuse subarachnoid hemorrhage. Imaging demonstrated a 3.5 mm pseudoaneurysm projecting distally from the basilar artery at the apex. Repeated imaging (CTA, digital subtraction angiography) demonstrated decreased size and flow associated within the aneurysm over the following 2 weeks; as such, the patient was managed conservatively. The patient was discharged in neurologically intact condition when imaging at 14 days confirmed complete and spontaneous resolution of the pseudoaneurysm. CONCLUSION: Idiopathic pseudoaneurysms that are commonly associated with atherosclerosis are most commonly managed surgically or endovascularly. Conservative approach may be considered in a select group of patients that exhibit decreased size and/or flow within the aneurysm in repeated imaging; spontaneous resolution was seen in the present case.