Background. Intracranial artery dissections are rare and many controversies exist about treatment options. The aim of this study was to evaluate the efficacy and safety of the endovascular approach in patients with an intracranial dissection presenting with different symptoms. Methods. We prospectively evaluated the clinical features and treatment outcomes of 30 patients who had angiographically confirmed nontraumatic intracranial dissections over 4 years. Patients were followed up for 17 months, and their final outcomes were assessed by the modified Rankin Score (mRS) and angiography. Results. Sixteen (53.3%) patients had a dissection of the anterior circulation, whereas 14 (46.7%) had a posterior circulation dissection. Overall, 83.3% of the patients suffered a subarachnoid hemorrhage (SAH). Grade IV Hunt and Hess score was seen in 32% of the SAH presenting cases. Parent artery occlusion (PAO) with coil embolization was used in 70% of the cases. The prevalence of overall procedural complications was 23.3%, and all were completely resolved at the end of follow-up. No evidence of in-stent occlusion/stenosis or rebleeding was observed in our cases during follow-up. Angiography results improved more frequently in the PAO with coil embolization group (100%) than in the stent-only-treated group (88.9%) ( ) and the unruptured dissection group (5/5, 100%) in comparison with the group that presented with SAH (95.8%) ( ). Conclusion. Favorable outcomes were achieved following an endovascular approach for symptomatic ruptured or unruptured dissecting aneurysms. However, the long-term efficacy and durability of these procedures remain to be determined in a larger series. 1. Introduction Arterial dissections are delineated by sudden disruption of the endothelium, the intima, and the internal elastic lamina with subsequent influx of circulating blood into the media. The pathogenesis of most intracranial artery dissections has been debated, and their etiology involves both extrinsic and intrinsic factors as well as defective repair mechanisms. Some of the factors associated with arterial dissections include hypertension, smoking, inflammatory diseases, genetic predisposition, fibromuscular dysplasia, collagen disease, and trauma [1]. Symptoms in patients with intracranial dissection can be related either to the mass effect, ischemia, or subarachnoid hemorrhage (SAH), or, in rare cases, to a combination of different presenting symptoms [2, 3] that can be described by the Mizutani et al. [4] classification of dissection pathomechanisms. A dissection diagnosis is
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