Tıp Fakültesi / Faculty of Medicine
Permanent URI for this collectionhttps://hdl.handle.net/11727/1403
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Item Simultaneous Sudden Hearing Loss and Peripheral Facial Paralysis in a Patient With Covid-19(2023) Ozer, Fulya; Alkan, Ozlem; https://orcid.org/0000-0001-5381-6861; 34219500; ABC-1809-2020Although peripheral facial paralysis and sudden sensorineural hearing loss are not as common as anosmia, they are reported neurological manifestations of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We present a 62-year-old, serologically COVID-19 positive woman with seventh and eighth nerve involvement showed electrophysiologically with Auditory Brainstem Response and electroneurography and radiologically with internal acoustic canal magnetic resonance imaging. This single case report suggests a possible association between the SARS-CoV-2 infection with simultaneous sudden sensorineural hearing loss and isolated facial paralysis. However, further studies are needed to determine whether this relationship is coincidental or occasional.Item Diffusion MR Imaging in Sporadic Creutzfeldt-Jakob Disease(2014) Pekoz, Burcak Cakir; Alkan, Ozlem; Giray, Semih; Demir, Senay; Altinkaya, Naime; 0000-0001-7526-3460; 0000-0003-1348-8167; 0000-0002-4209-9075; 0000-0002-0722-3181; AAM-4169-2021; AAM-5169-2021; AAK-9310-2021; AAH-1091-2020Creutzfeldt-Jakob disease (CJD) is a rare dementing disease and is thought to caused by a prion. It is characterized by rapidly progressive dementia, ataxia, myoclonus, akineticmutism and eventual death. Brain biopsy or autopsy is required for a definitive diagnosis of CJD. Diffusion-weighted imaging became an important tool for early diagnosis of CJD because of the high sensitivity. We present 59-year-old female patient diagnosed as sporadic CJD with typical MR imagings.Item Diagnostic Value of T2*-Weighted Gradient-Echo MRI for Segmental Evaluation in Cerebral Venous Sinus Thrombosis(2015) Altinkaya, Naime; Demir, Senay; Alkan, Ozlem; Tan, Meliha; 0000-0002-4209-9075; 0000-0003-1348-8167; 0000-0001-7526-3460; 25148696; AAK-9310-2021; AAM-5169-2021; AAM-4169-2021Objective: We evaluated the diagnostic value of gradient-echo (GRE) imaging in patients with "cerebral venous and sinus thrombosis" (CVST). Materials and Methods: In total, 130 thrombosed venous segment signal intensities in 45 patients with CVST were analyzed retrospectively using magnetic resonance imaging and magnetic resonance venography. Results: The T2* GRE sequence had a diagnostic value for detecting acute and subacute superior sagittal sinus (SSS) thrombosis and thrombosis of the deep veins (DVs), and cortical veins (CVs; P<.05). Conclusions: The T2* GRE sequence had a high diagnostic value for detecting both acute and subacute SSS, DV, and CV thromboses. (C) 2015 Elsevier Inc. All rights reserved.Item Potentially Reversible Encephalopathy in Children with Chronic Renal Failure(2015) Dursun, Hasan; Cengiz, Nurcan; Saygi, Semra; Alkan, Ozlem; Savas, Tulin; Noyan, Aytul; 0000-0002-8817-494X; 0000-0001-7526-3460; 0000-0002-8522-5078; AAB-7105-2020; AAM-4169-2021; AAB-1203-2021; AAD-5713-2021Item Optic Neuritis as A Presenting Symptom of Mycoplasma Pneumoniae Infection(2015) Ozkale, Yasemin; Erol, Ilknur; Coban Karatas, Muge; Alkan, Ozlem; 0000-0003-3009-336X; 0000-0001-7526-3460; 0000-0002-3530-0463; 27186706; AAL-6136-2021; AAM-4169-2021; AAK-4825-2021A broad range of neurologic disorders has been described in children infected with Mycoplasma pneumoniae, of which encephalitis is among the most common. In contrast, the association between optic neuritis and Mycoplasma pneumoniae infection has been rarely described in children. We report a case of a 12-year-old girl who was seropositive for antibodies against Mycoplasma pneumoniae and presented with optic neuritis without respiratory symptoms or other neurologic findings.Item Comparison of Low and High Grade Glioma Maps(2015) Cotur, Yasin; Ozkan, Mehmed; Demir, Ali; Turnaoglu, Hale; Agildere, Ahmet M.; Alkan, Ozlem; Ulug, Aziz M.; 0000-0002-0781-0036; 0000-0003-4223-7017; AAK-8242-2021; AAB-5802-2020It is crucial to detect the locations of brain tumors for the diagnosis. The aim of this study was the generation and comparison of the high and low-grade probabilistic brain tumor maps to present the tumor observance frequencies in the brain tissue. T1-weighted, pre-operated data from 162 brain tumor patients are examined during the study. Although most of high-grade tumors are located around the superior and right lateral regions of sub-ventricular zone, low-grade gliomas are mostly observed in the posterior part of the sub-ventricular zone. Moreover, since all types of tumors are gathered close to the sub-ventricular zone, our results support the theory proposing that there is a relation between gliomas and sub-ventricular zone, which is the origin of glial cells.Item Variability of Dose and Level of Sirolimus in a Patient With Tuberous Sclerosis Complex and Subependymal Giant Cell Astrocytoma(2016) Yazici, Nalan; Sarialioglu, Faik; Alkan, Ozlem; Erol, Ilknur; Erbay, Ayse; 0000-0003-4465-8229; 0000-0002-3530-0463; 0000-0001-7526-3460; 0000-0002-8257-810X; 27082208; AAM-5138-2021; AAK-4825-2021; AAM-4169-2021; AAL-7766-2021Item Neuromyelitis Optica Mimics the Morphology of Spinal Cord Tumors(2016) Erol, Ilknur; Ozkale, Murat; Savas, Tulin; Alkan, Ozlem; Cekinmez, Melih; Erbay, Ayse; 0000-0002-3530-0463; 0000-0003-0625-1057; 0000-0001-9658-9005; 0000-0001-7526-3460; 28266199; AAK-4825-2021; A-7806-2016; AAM-4169-2021Neuromyelitis optica (NMO) is an autoimmune disorder of the central nervous system, that predominantly affects the spinal cord and the optic nerve. Its key features include transverse myelitis, commonly associated with extensive inflammation spanning three or more consecutive vertebral segments. Longitudinal extensive spinal cord lesions can also occur in systemic autoimmune diseases, infections, vascular and metabolic disorders, subsequent to irradiation, intramedullary tumors and paraneoplastic myelopathies. We present a case study of an 8-year-old girl seropositive for antibodies against the aquaporin 4 who displayed longitudinal extensive spinal cord lesions, that was initially misdiagnosed as an intramedullary tumor.Item Measurements of Retinal Nerve Fiber Thickness and Ganglion Cell Complex in Neurofibromatosis Type 1, with and Without Optic Pathway Gliomas: A Case Series(2018) Sahinoglu-Keskek, Nedime; Altan-Yaycioglu, Rana; Canan, Handan; Coban-Karatas, Muge; Erbay, Ayse; Yazici, Nalan; Alkan, Ozlem; https://orcid.org/0000-0001-8544-103X; https://orcid.org/0000-0002-9139-8848; https://orcid.org/0000-0002-5877-6536; https://orcid.org/0000-0001-7526-3460; 29185816; T-4258-2017; AAG-3306-2019; AAB-6394-2021; AAM-5138-2021; AAM-4169-2021Purpose: The aim of this study was to investigate differences in retinal nerve fiber layer (RNFL) and ganglion cell complex (GCC) thicknesses in neurofibromatosis 1 (NF1) cases, with and without optic pathway gliomas (OPGs). Materials and Methods: In total, 33 eyes of 33 subjects were evaluated in this prospective observational case series. Twenty-one patients with a diagnosis of NF1 were enrolled. Patients with NF1 and OPGs were included in Group 1 (n=9), and patients with NF1 without OPGs were included in Group 2 (n=12). The control group (Group 3) was comprised of 12 age- and sex-matched subjects with no history of ophthalmic or systemic diseases. All of the subjects underwent complete ophthalmic examinations, including best-corrected visual acuity (BCVA), slit lamp microscopy, and indirect ophthalmoscopy. Additionally, optical coherence tomography (OCT) measurements were obtained. Results: There were no statistically significant between-group differences in age and sex (p=0.227 and 0.986, respectively). The average RNFL thickness in Group 1 (NF1 patients with OPGs) was significantly lower than in Groups 2 and 3 (86.6 +/- 22.5, 107.4 +/- 6.65, and 108.4 +/- 5.05 mu m, respectively; p=0.001). Furthermore, the average GCC thickness in Group 1 was significantly lower than in Groups 2 and 3 (78.6 +/- 16.3, 94.8 +/- 3.55, and 94.9 +/- 3.82 mu m, respectively; p<0.001). Conclusions: Both RNFL and GCC thicknesses were significantly lower in NF1 patients with OPGs. The use of OCT to quantify damage to the visual pathway may enable earlier detection of OPGs in NF1 patients.Item Case Report First pediatric case with primary familial brain calcification due to a novel variant on the MYORG gene and review of the literature(2021) Orgun, Leman Tekin; Besen, Seyda; Sangun, Ozlem; Bisgin, Atil; Alkan, Ozlem; Erol, IlknurVariants in the myogenesis-regulating glycosidase (MYORG) gene which is known as the first autosomal recessive gene that has been associated with primary familial brain calcification (AR-PFBC). Although adult patients have been reported, no pediatric case has been reported until now. Herein, we review the clinical and radiological features of all AR- PFBC patients with biallelic variants in the MYORG gene who were reported until now, and we report the youngest patient who has a novel homozygous variant. Since the first identification of the MYORG gene in 2018, 74cases of MYORG variants related to AR-PFBC were evaluated. The ages of symptom onset of the patients ranged between 7.5 and 87 years. The most frequent clinical courses were speech impairment, movement disorder and cerebellar signs. All patients showed basal ganglia calcification usually bilaterally with different severities. Conclusion; herein, we reported the first pediatric patient in the literature who had a novel homozygous variant in the MYORG gene with mild clinic findings. (c) 2021 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved.
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