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    The relationship between perimesencephalic subarachnoid hemorrhage and deep venous system drainage pattern and calibrations
    (Elsevier Science Inc, 2014) Büyükkaya, Ramazan; Yıldırım, Nalan; Cebeci, Hakan; Kocaeli, Hasan; Dusak, Abdurrahim; Ocakoğlu, Gökhan; Hakyemez, Bahattin
    Background and purpose: The purpose of this study is to investigate the relationship between Rosenthal basal vein (BVR) type and diameter and perimesencephalic nonaneurysmal subarachnoid hemorrhage (P-SAH). Materials and methods: Aneurysmal subarachnoid hemorrhage (A-SAH), P-SAH, and control groups were evaluated, and BVRs were classified by type. BVR diameters in patients were measured. Results: There was a statistically significant difference of BVR drainage types between groups (P=.002). BVR diameters of patients with normal drainage pattern in P-SAH group were significantly smaller than those in both other groups (P<.001). Conclusion: There is a relationship between P-SAH and BVR primitive drainage type. P-SAH risk increases in parallel with decreasing caliber of BVR in patients with normal drainage pattern.(C) 2014 Elsevier Inc. All rights reserved.
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    Thoracolumbar Glomus-type Intramedullary Arteriovenous Malformations Presenting with Nonperimesencephalic Subarachnoid Hemorrhage: A Case Report
    (Lippincott Williams and Wilkins, 2015) Büyükkaya, Ramazan; Cebeci, Hakan; Aydın, Ömer; Erdoğan, Cüneyt; Hakyemez, Bahattin
    A 22-year-old man presented with severe head and neck pain, nausea, and vomitting at the emergency department. Computed tomography revealed nonperimesencephalic subarachnoid hemorrhage. Subarachnoid hemorrhage is caused by a spinal glomus type (type 2) intramedullar arteriovenous malformation (AVM) at Th10-12 level. Venous hypertension is considered as the underlying factor of subarachnoid hemorrhage associated with spinal AVM. We aimed to present a spinal glomus type (type 2) intramedullary AVM that presented with nonperimesencephalic subarachnoid hemorrhage accompanied by the literature. © 2014 Wolters Kluwer Health, Inc. All rights reserved.
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    Treatment of Complex Intracranial Aneurysms Using Flow-Diverting Silk (R) Stents An Analysis of 32 Consecutive Patients
    (Sage Publications Inc, 2014) Büyükkaya, Ramazan; Kocaeli, Hasan; Yıldırım, Nalan; Cebeci, Hakan; Erdoğan, Cüneyt; Hakyemez, Bahattin
    This study describes the pen-procedural and late complications and angiographic follow-up results of 32 patients with 34 complex aneurysms treated with flow diverter Silk stents in a single centre. In this retrospective study, 40 Silk stents (SS) were implanted in 34 complex intracranial aneurysms in 32 patients. In our series, 20 (58.8%) carotid-ophthalmic internal carotid artery (ICA), six (17.6%) cavernous ICA, two (5.9%) supraclinoid ICA, two (5.9%) petrosal ICA (the same patient-bilateral) and four (11.8%) posterior circulation aneurysms were treated. One of the posterior circulation lesions was a fenestrated-type aneurysm. Twenty wide-necked, saccular; eight neck remnant; four fusiform and two blister-like aneurysms were included in our series. SS were successfully implanted in all patients (100%). Mis-deployment occurred in 17.6% of patients. In two of these patients adequate stent openness was achieved via Hyperglide balloon dilatation. Coil embolization in addition to SS placement was utilized in four aneurysms. One patient (3%) experienced transient morbidity due to a thromboembolic event and there was one mortality (3%) due to remote intraparenchymal haemorrhage. Complete occlusion of 27/33 (81.8 %) and 29/33 (87.9 %) aneurysms was achieved six and 12 months after the procedure, respectively. In-stent intimal hyperplasia was detected in 6.1 % patients. Flow-diverter Silk stent implantation is an effective method of treating complex aneurysms with acceptable mortality and morbidity rates. Complete occlusion is achieved in most of the complex aneurysms.