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Öğe Contrast-enhanced MR 3D angiography in the assessment of brain AVMs(Elsevier Ireland Ltd, 2006) Unlu, Ercument; Temizoz, Osman; Albayram, Sait; Genchellac, Hakan; Hamamcioglu, M. Kemal; Kurt, Imran; Demir, M. KemalBackground and purpose: Digital subtraction angiography (DSA) is the current reference standard for the diagnosis, assessment, and management of brain arteriovenous malformations (AVMs). The purpose of this study was to compare the diagnostic utility of three-dimensional (3D) time-off-light (TOF) magnetic resonance angiography (MRA) and contrast-enhanced 3D MRA in patients with intracranial arteriovenous malformations (AVMs) in different sizes and locations. The AVM diagnosis was proved via DSA and almost half of the patients had also hematoma. Materials and methods: Two radiologists, experienced on neurovascular imaging and independent from each other, retrospectively reviewed two MRA techniques and DSA with regard to the assessment of feeding arteries, AVM nidus, and venous drainage patterns on 20 patients with 23 examinations by scoring system. Disagreements were resolved by consensus. Results: An excellent agreement between contrast-enhanced MRA and DSA was found in order to assess the numbers of arterial feeders and draining veins (Spearman r=0.913, P<0.001). The average scores in contrast-enhanced MRA for feeders, nidi, and drainers were respectively 2.26, 2.69, and 2.48, while in TOF-MRA they are 1.96, 1.35, and 0.89, respectively. Conclusion: Compared to TOF-MRA, 3D contrast-enhanced MRA is useful for visualization by subtraction technique of malformation components presented by hematoma or by haem product. On the other hand, for the cases presented by slow or complex flow that is especially in around or nidi or around the venous portion is also advantageous because of the independence from flow-related enhancement. Therapeutic effects were clearly demonstrated in three follow-up patients. A major limitation of this technique is the low spatial resolution. Since there is such a limitation, arterial feeder of a case with micro-AVM is not detected by contrast-enhanced MRA and nidus for the same case was observed retrospectively. In this respect, we believe that 3D contrast-enhanced MRA is a less invasive and inexpensive angiographic tool, but not a safe substitute for DSA. Yet, it can be a beneficial supplement to DSA in patients with cerebral AVMs at both initial diagnosis and at follow-up processes after therapy. (C) 2006 Elsevier Ireland Ltd. All rights reserved.Öğe Erdheim-Chester Disease Presented with Bilateral Carotid Artery Occlusion: Case Report(Turkish Neurological Soc, 2010) Celik, Yahya; Balci, Kemal; Asil, Talip; Tuzun, Erdem; Hamamcioglu, Mustafa Kemal; Temizoz, Osman; Albayram, SaitErdheim-Chester disease is a rare, non-Langerhans form of systemic histiocytosis of unknown etiology. The disease affects multiple organ systems, including musculoskeletal, cardiac, pulmonary, gastrointestinal, and central nervous systems, producing protean manifestations. Neurological manifestations are less frequent. We present a 44-year-old patient with Erdheim-Chester disease who had bilateral carotid artery occlusion and cavernous sinus infiltration.Öğe Postural tremor as a manifestation of spontaneous intracranial hypotension(Elsevier Sci Ltd, 2010) Turgut, Nilda; Unlu, Ercuement; Hamamcioglu, Mustafa Kemal; Guldiken, Babuerhan; Albayram, SaitSpontaneous intracranial hypotension (SIH) is a syndrome caused by low cerebrospinal fluid (CSF) pressure due to leakage of CSF. Clinically, orthostatic headache, neck pain, nausea, emesis, interscapular pain, diplopia, dizziness, changes in hearing, visual blurring and radicular upper extremity symptoms are most frequently observed. We describe a 57-year-old man with SIH who presented with postural tremor. CSF leakage was revealed by cranial MRI. Lumbar puncture identified low CSF pressure and intrathecal gadolinium enhanced MR cisternography showed diffuse CSF leakage in the thoracolumbar region. The patient underwent epidural blood patching, which resulted in complete resolution of postural tremor within 2 months. (C) 2009 Elsevier Ltd. All rights reserved.Öğe Spontaneous intracranial hypotension presenting with coma: a case report and literature review(Kare Publ, 2015) Celik, Yahya; Tekatas, Aslan; Albayram, Sait; Gunduz, Aysegul; Asil, Talip; Unlu, Ercument; Ozlece Kose, HaticeSpontaneous intracranial hypotension is characterized by orthostatic headache in the absence of a history of head trauma or lumbar puncture, and diagnosis is confirmed by a specific cerebrospinal fluid pressure and neuroimaging findings. It rarely presents with coma. A 62-year-old man presented with progressive cognitive decline of 2 to 4 weeks' duration. He was diagnosed with spontaneous intracranial hypotension according to cerebrospinal fluid pressure and neuroimaging findings, and treated conservatively.
