Person: SEYİTHANOĞLU, MEHMET HAKAN
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Publication Open Access A Rare Cause of Headache in the Emergency Department: Intraventricular Epidermoid Cyst Rupture With Hydrocephalus.(2016-07-01) YIGIT, M; Seyithanoglu, MEHMET HAKAN; DUNDAR, TOLGA TURAN; SOGUT, O; YIGIT, E; SEYİTHANOĞLU, MEHMET HAKAN; DÜNDAR, TOLGA TURANLateral intraventricular tumors are not frequently observed. Since these tumors grow linearly rather than exponentially, they grow gradually and thus do not cause mass effects and hydrocephalus. This study is the case report of a rare great volume left intraventricular epidermoid cyst rupture. The tumor was found to be associated with mass effect on neighboring structures and hydrocephalus.Publication Metadata only COMPARISON BETWEEN THE PRE- AND POSTOPERATIVE RADIOLOGICAL FINDINGS AND CLINICAL OUTCOMES EVALUATION OF THE PATIENTS WHO UNDERWENT SURGERY FOR LUMBAR SPONDYLOLISTHESIS(2018-04-01T00:00:00Z) Papaker, Meliha Gundağ; EMEL, ERHAN; Abdallah, Anas; SEYİTHANOĞLU, MEHMET HAKAN; DÜNDAR, TOLGA TURAN; Kitiş, Serkan; SEYİTHANOĞLU, MEHMET HAKAN; DÜNDAR, TOLGA TURANPublication Metadata only Beyin Tümörü Kök Hücresi(2018-09-01T00:00:00Z) DÜNDAR, TOLGA TURAN; Kitiş, Serkan; Papaker, Meliha Gundağ; Abdallah, Anas; Ozek, Erdinc; SEYİTHANOĞLU, MEHMET HAKAN; ÇETİN, GÜVEN; DÜNDAR, TOLGA TURAN; SEYİTHANOĞLU, MEHMET HAKAN; ÇETİN, GÜVENPublication Open Access Investigation of Brain Impairment Using Diffusion-Weighted and Diffusion Tensor Magnetic Resonance Imaging in Experienced Healthy Divers.(2018-11-17) SEYITHANOĞLU, MEHMET HAKAN; ABDALLAH, ANAS ABDELRAHIM SA; Dündar, TOLGA TURAN; KITIŞ, SERKAN; ARALAŞMAK, AYŞE; Gündağ, Papaker; SASANI, H; SEYİTHANOĞLU, MEHMET HAKAN; ABDALLAH, ANAS ABDELRAHıM SA; DÜNDAR, TOLGA TURAN; KİTİŞ, SERKAN; ARALAŞMAK, AYŞE; GUNDAG, MELİHABackground: The aim of this study was to understand the changes of decompression illness in healthy divers by comparing diffusion-weighted (DWI) and diffusion tensor MRI findings among healthy professional divers and healthy non-divers with no history of diving. Material/Methods: A total of 26 people were recruited in this prospective study: 11 experienced divers with no history of neurological decompression disease (cohort) and 15 healthy non-divers (control). In all study subjects, we evaluated apparent diffusion coefficient (ADC) and type of diffusion tensor metric fractional anisotropy (FA) values of different brain locations (e.g., frontal and parieto-occipital white matter, hippocampus, globus pallidus, putamen, internal capsule, thalamus, cerebral peduncle, pons, cerebellum, and corpus callosum). Results: ADC values of hippocampus were high in divers but low in the control group; FA values of globus pallidus and putamen were lower in divers compared to the control group. DWI depicted possible changes due to hypoxia in different regions of the brain. Statistically significant differences in ADC values were found in hypoxia, particularly in the hippocampus (p=0.0002), while FA values in the globus pallidus and putamen were statistically significant (p=0.015 and p=0.031, respectively). We detected forgetfulness in 6 divers and deterioration in fine-motor skills in 2 divers (p=0.002 and p=0.17, respectively). All of them were examined using neuro-psychometric tests. Conclusions: Repeated hyperbaric exposure increases the risk of white matter damage in experienced healthy divers without neurological decompression illness. The hippocampus, globus pallidus, and putamen are the brain areas responsible for memory, learning, navigation, and fine-motor skills and are sensitive to repeated hyperbaric exposurePublication Metadata only Comparison of TOF MRA, Contrast-Enhanced MRA and Subtracted CTA from CTP in Residue Evaluation of Treated Intracranial Aneurysms(2018-01-01) Dundar, TOLGA TURAN; Kits, Serkan; Ozdemir, HÜSEYİN; Seyithanoglu, MEHMET HAKAN; Uysal, Omer; Toprak, HÜSEYİN; Ozek, ERDİNÇ; Alkan, ALPAY; DÜNDAR, TOLGA TURAN; ARALAŞMAK, AYŞE; ÖZDEMİR, HÜSEYIN; SEYİTHANOĞLU, MEHMET HAKAN; UYSAL, ÖMER; TOPRAK, HÜSEYİN; KİTİŞ, SERKAN; ÖZEK, ERDİNÇ; ALKAN, ALPAYAIM: To compare effectiveness of contrast-enhanced magnetic resonance angiography (CE-MRA), 3D-Time-of-flight magnetic resonance angiography (3D-TOF-MRA) and subtracted computed tomography angiography from computed tomography perfusion (sub-CTA) in residue evaluation of intracranial aneurysms treated either with coiling or clipping.Publication Metadata only The Use of Neuronavigation with Vasular Microdoppler in Transsphenoidal Pituitary Surgery(2016-01-01) SEYİTHANOĞLU, MEHMET HAKAN; kitiş, serkan; GÜNDAĞ PAPAKER, MELİHA; ÇALIŞ, FATİH; DÜNDAR, tolga; ÇEVİK, serdar; SEYİTHANOĞLU, MEHMET HAKAN; KİTİŞ, SERKAN; GUNDAG, MELİHA; DÜNDAR, TOLGA TURANPublication Metadata only Exophytic giant cell glioblastoma in a patient with neurofibromatosis type 1: case report(2017-06-01) GÜNDAĞ PAPAKER, MELİHA; KITIS, SERKAN; SEYİTHANOĞLU, MEHMET HAKAN; DUNDAR, TOLGA TURAN; TOSUNER, ZEYNEP; GUNDAG, MELİHA; KİTİŞ, SERKAN; SEYİTHANOĞLU, MEHMET HAKAN; DÜNDAR, TOLGA TURAN; TOSUNER, ZEYNEPPublication Metadata only A Rare Presentation of Neurobrucellosis in a 6-Year-Old Pediatric Patient with Sagittal Sinus Thrombosis(2020-10-01T00:00:00Z) TÜREL, Özden; KUTLU, NURETTİN ONUR; YEŞİLBAŞ, Osman; Yozgat, Can Yilmaz; DÜNDAR, TOLGA TURAN; BURSAL DURAMAZ, BURCU; UZUNER, SELÇUK; ABDİLLAHİ, FATOUMA KHALİF; TÜREL, ÖZDEN; UZUNER, SELÇUK; BURSAL DURAMAZ, BURCU; DÜNDAR, TOLGA TURAN; SEYİTHANOĞLU, MEHMET HAKAN; YEŞİLBAŞ, OSMAN; KUTLU, NURETTİN ONURBrucellosis is one of the most common zoonosis worldwide. It is still endemic in many regions of the world. A 6-year-old female was admitted to the emergency department (ED) due to a sudden change in consciousness, urinary incontinence, vomiting, and difficulty in walking. Neurological examination demonstrated abducens nerve paralysis, mild-to-moderate motor deficit in hemiparesis in the left arm. Brain magnetic resonance imaging showed a hemorrhagic focus at the right frontal lobe and thrombosis in the superior sagittal sinus of the brain. The diagnosis of neurobrucellosis was confirmed by identifying Brucella spp. in the blood culture on the day 6 of pediatric intensive care unit admission; thus, trimethoprim-sulfamethoxazole and rifampicin, and ceftriaxone were promptly initiated. Despite neuroprotective management and acetazolamide, the patient-s neurological problems and high intracranial pressure (ICP) persisted. An external ventricular drainage tube and a Codman ICP monitor were placed to be on the consent vigilance of the patient-s neurological condition. The patient-s ICP continued to increase despite the current treatment regimen; therefore, a decompressive bitemporal craniectomy was performed. The ICP level of the patient returned to its normal range immediately after the craniectomy. The patient did not have any notable neurologic sequelae at the first-year follow-up. Neurobrucellosis is a rare complication of systemic brucellosis and may present as meningitis, encephalitis, myelitis, radiculitis, and/or neuritis. Herein, we describe a six-year-old girl with brucellosis complicated with cerebral vein thrombosis. This case illustrates the need for close monitoring of patients with unexplained neurological signs or symptoms for brucellosis in endemic areas.Publication Metadata only Beyin Tümörü Kök Hücresi(2018-10-01T00:00:00Z) Dündar, Tolga Turan; Kitiş, Serkan; Gundag, Meliha; Özek, Erdinç; Abdallah, Anas; Seyithanoğlu, Mehmet Hakan; Çetin, Güven; DÜNDAR, TOLGA TURAN; KİTİŞ, SERKAN; GUNDAG, MELİHA; ÖZEK, ERDİNÇ; SEYİTHANOĞLU, MEHMET HAKAN; ÇETİN, GÜVENPublication Open Access Frameless Neuronavigation Assisted Brain Biopsy: Safety, Efficiency and Our Experience(2019-03-01T00:00:00Z) SEYİTHANOĞLU, MEHMET HAKAN; ÖZEK, ERDİNÇ; SEYİTHANOĞLU, MEHMET HAKAN; KİTİŞ, SERKAN; DÜNDAR, TOLGA TURAN; TEKİN, ABDURRAHIM; HATİBOĞLU, MUSTAFA AZİZ