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SEYİTHANOĞLU, MEHMET HAKAN

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MEHMET HAKAN
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SEYİTHANOĞLU
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Author: GUNDAG, MELİHA × Type: Article ×

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Now showing 1 - 10 of 13
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    Comparison of Classical Laminectomy and Transspinous-Split Laminectomy Techniques
    (2016-07-01) KİTİŞ, SERKAN; SEYİTHANOĞLU, MEHMET HAKAN; GUNDAG, MELİHA; Çevik, Serdar; Emel, Erhan; KİTİŞ, SERKAN; SEYİTHANOĞLU, MEHMET HAKAN; GUNDAG, MELİHA
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    Leriche Syndrome With Lumbar Disc Hernia: First Case Report in Literature
    (2011-01-01) Seyithanoglu, MEHMET HAKAN; Gundag, MELİHA; DOGAN, Kazim; Kitis, SERKAN; Aydin, TEOMAN; PERU, Celalettin; SEYİTHANOĞLU, MEHMET HAKAN; GUNDAG, MELİHA; KİTİŞ, SERKAN; AYDIN, TEOMAN
    Leriche syndrome and lumbar disc herniation have typical clinical findings of their own, although similar findings can form in the lower extremities. Lumbar disc herniation surgery is commonly performed today. With radiological and clinical findings; such as low back and lower limb pain which not heal with medical treatment, motor and sensorial deficit and reflex amendments are indications of surgery. In differential diagnosis of lumbar disc herniation, rare pathologies such as Leriche syndrome should be considered. This syndrome is an occlusive thrombotic lesion of proximal part of bifurcation of abdominal aorta. The characteristic symptoms include inability to maintain penile erection, fatigue of both lower limbs, intermittent bilateral claudication with ischemic pain and absent or diminished femoral pulses along with pallor or coldness of both lower extremities. This patient was operated before with diagnose of lumbar disc herniation because of overlapping of symptoms and after 40 days Leriche syndrome was diagnosed. Vascular lesions should be considered in preoperative differential diagnosis in cases with radiologically and clinically diagnosed lumbar disc herniation. Symptoms should be depend on Leriche syndrome, findings of two disease should be together.
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    PublicationOpen 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, MELİHA
    Background: 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 exposure
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    can radioterapy be a new treatment for post laminectomy low back syndrome?
    (2018-07-01T00:00:00Z) SEYİTHANOĞLU, MEHMET HAKAN; GÜNDAĞ PAPAKER, MELİHA; DÜNDAR, TOLGA; kitiş, serkan; SEYİTHANOĞLU, MEHMET HAKAN; GUNDAG, MELİHA
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    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 TURAN
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    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, ZEYNEP
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    Effects of Melatonin on Osteoblastic and Osteoclastic Activities of Bone Tissue
    (2015-01-01T00:00:00Z) TURGUT, MEHMET; Papaker, Meliha Gundag; KAPLAN, Süleyman; SEYİTHANOĞLU, Mehmet Hakan; Tuzgen, Saffet; GUNDAG, MELİHA; SEYİTHANOĞLU, MEHMET HAKAN
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    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, GÜVEN
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    PublicationOpen Access
    Spontaneous Resolution of Paraparesis Because of Acute Spontaneous Thoracolumbar Epidural Hematoma
    (2012-01-01) GUNDAG, MELİHA; DOGAN, K.; Kitis, SERKAN; Ozkan, N.; GUNDAG, MELİHA; SEYİTHANOĞLU, MEHMET HAKAN; KİTİŞ, SERKAN
    Symptomatic spontaneous spinal epidural hematoma(SSEH) is an uncommon cause of cord compression that commonly is considered an indication for emergent surgical decompression. We aimed to investigate a patient with a SSEH that completely resolved clinically and radiographically, without surgical treatment. The patient presented three days after the sudden onset of back pain, numbness, and weakness. Magnetic Resonance Imaging (MRI) revealed a posterior thoracolumbar epidural hematoma extending from the level of T10 to L2 with significant cord compression. Decompression was recommended but he refused surgery and was managed conservatively. One month later weakness totally recovered and hematoma was absent on MRI.
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    Early stage T1-weighted perfusion magnetic resonance imaging: a factor that predicts local control response in patients with meningioma who underwent gamma-knife radiosurgery
    (2022-08-01T00:00:00Z) Abdallah, Anas; SEYİTHANOĞLU, MEHMET HAKAN; Papaker, Meliha Gundag; Aralasmak, Ayse; YAPAR, SELÇUK; Baloglu, Gokhan; SEYİTHANOĞLU, MEHMET HAKAN; GUNDAG, MELİHA; ARALAŞMAK, AYŞE; YAPAR, SELÇUK
    Background Gamma-knife radiosurgery (GKRS) is an alternative treatment option for selected intracranial meningiomas. The study-s aim is to demonstrate the advantages of T1-weighted perfusion magnetic resonance imaging (T1-PMRI) by measuring the volume transfer coefficient (K-trans) values in the prediction of local response for patients with meningioma who have undergone GKRS consecutively. Methods The data of patients diagnosed radiologically with WHO grade 1 intracranial meningiomas was collected prospectively. The patients who were treated consecutively with GKRS at our institution (September 2017-September 2018) were included. After GKRS, the patients were followed up at the defined periods with routine contrast-enhanced MRI and T1-PMRI by measuring the K-trans. The comparison between the pre-treatment and third-month post-treatment (PO3M) K-trans was done using the Wilcoxon signed-rank test. Results Thirty-one patients with 36 tumors have undergone GKRS. Twenty-two patients were female. The mean age was 55.3 years. The mean pre-GKRS volume was 7.67 ccs. The mean 50% radiation isodose was 12.2 Gy. The local tumor control rate was 100%. Fourteen tumors were regressed fully at the last MRI. PO3M K-trans decreased when compared with the pre-GKRS values (p < 0.0001). However, the numerical decrease in tumor volumes on contrast-enhanced MRI was not statistically significant (p = 0.117). Conclusion Changes between K-trans on PO3M and pre-GKRS T1-PMRI were more useful in determining the early response to GKRS in patients with meningioma than volumetric changes. Therefore, K-trans should be taken as a reference to predict the early response to GKRS in follow-up imaging scans.