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    A nonspecific widespread involvement of encephalitis in a covid-19 patient
    (A. CARBONE Editore, 2022) Erok, Berrin; Atca, Ali Önder
    Encephalopathic symptoms including headache and altered mental status in hospitalized patients due to Covid-19 infection have been reported frequently in the recent literature. Moreover, neuroimaging correlation of some of these patients have been deonstrated with various forms of encephalitis. We aimed to describe the neuroimaging manifestations of an acute encephalitis with widespread involvement of deep white matter and deep gray matter areas that resolve following steroid treatment in a young male patient. We hope our case will add in the understanding of the range of neurological involvemnets related with Covid-19. More data about neuroimaging and neuropathological examinations are need to determine the neurotropism and particular types of involvements in the central nervous system.
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    Chest CT imaging features of early phase covid-19 pneumonia
    (Carbone Editore, 2021) Erok, Berrin; Atca, Ali Önder
    Introduction: COVID-19 (coronavirus disease 2019) is a viral infectious disease presenting with primarily pulmonary involvement. It is caused by SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2), a strain of coronavirus. A wide variety of chest computed tomography (CT) findings have been reported in patients with Covid-19 pneumonia. However, these CT features are not specific for Covid-19 and are similar to various other viral pneumonia, atypical pneumonia or organizing pneumonia of different etiologies. For differentiation of Covid-19 pneumonia, some more prevelant CT manifestations have been demonstrated in various studies comparing Covid-19 and non-Covid viral pneumonia. Materials and Methods: We aimed to present the initial chest CT findings observed in our patients with rRT-PCR test-confirmed COVID-19, from the March 15 to August 15, 2020 were presented. Results: As shown in previous reports, our experience has also showed that the most common and typical chest CT manifestations of Covid-19 are multifocal ground glass opacities (GGOs) with peripheral/subpleural distribution predominantly starting from middle&lower zones, with second most frequent is reticulation and consolidation. Based our experience, we have recognized that in Covid 19 pneumonia perilesional pulmonary vascular prominence, isolated nodular involvements and reversed halo sign are more prevelant when compared with non-Covid viral pneumonia. Conclusion: We believe that being familier with the common and typical CT features of Covid-19 pneumonia and the recognition of unusual findings will be helpful in the management of Covid-19 pneumonia.
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    Incomplete circle of willis: A possible triggering factor for migraine
    (2022) Erok, Berrin; Win, Nunu; Agolli, Elidor; Kıbıcı, Kenan; Atca, Ali Önder
    The Circle of Willis (CoW) is an anastomotic arterial heptagon which is located at the inferior surface of the brain, within the interpedincular cistern. It is formed by the anteriorly located internal carotid arterial system and the posteriorly located vertebrobasilar arterial (BA) system and provides an important collateral pathway to maintain sufficient cerebral perfusion. However, based on the complexity of the embryological development, there are numerious individual anatomical variations.
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    Measurement of apparent diffusion coefficient in discrimination of benign and malignant axillary lymph nodes
    (Int Scientific Information Inc, 2019) Yılmaz, Ebru; Erok, Berrin; Atca, Ali Önder
    Purpose: We aimed to determine the contribution of the apparent diffusion coefficient (ADC) value in the detection of axillary lymph node metastasis. Material and methods: Breast magnetic resonance of 58 patients, performed in the radiology clinic of our hospital between 2015 and 2017 were examined retrospectively, and 43 lymph nodes in 43 patients were included in the study. They were evaluated morphologically on T1W and T2W sequences, and the lymph nodes showing rounded shape, focal or diffuse cortical thickness of more than 3 mm, and partial or total effacement of fatty hilum were included in the study. Subsequently, their ADC values were measured. Results: There were 43 lymph nodes, 20 of which were malignant and 23 of which were benign. While the mean ADC value of malignant axillary lymph nodes was 0.749 10(-3) min(2)/s (0.48-1.342), it was 0.982 10(-3) mm(2)/s (0.552-1.986) for benign lymph nodes. When the ADC cut-off value was taken as <= 0.753 x 10(-3) mm(2)/s, its discrimination power between benign and malignant axillary lymph nodes was as follows: sensitivity - 60%; specificity - 91.3%; accuracy - 76.7%; positive predictive value - 85.7%; and negative predictive value - 72.4%. Conclusions: There was no significant difference between mean ADC value of 12 lymphadenopathies (LAP) associated with inflammatory breast diseases (granulomatous mastitis and acute suppurative mastitis) and mean ADC value of metastatic lymph nodes. However, the ADC value of lymph nodes showing thickened cortex due to systemic inflammatory diseases was over 1, and there was a statistically significant difference when compared with metastatic lymph nodes.
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    Neurological complications encountered in imaging studies in association with COVID-19 - a single center analysis
    (Publishing Office of the University of Rzeszow, 2023) Erok, Berrin; Atca, Ali Önder; Önder, Hakan
    Introduction and aim. COVID-19 is a viral infectious disease, which was first reported in patients with unusual pneumonia in December 2019. However, as the pandemic progressed, extrapulmonary manifestations including various neurologic complications have been started to be increasingly reported. In this retrospective study, we tried to search the neurological complications seen in our patients with positive rRT-PCR test for COVID-19 and examine the underlying associated risk factors. Material and methods. We have retrospectively analyzed the neuroimaging studies performed in our patients with positive rRT-PCR test for COVID-19 between April, 2020 and August, 2021. Both computed tomography (CT) scans and magnetic resonance imagings (MRI) of brain, head & neck region and the spine were retrospectively evaluated for the presence of any complications in patients with positive rRT-PCR test for COVID-19. Results. There were 147 patients having neuroradiological imaging studies performed for various neurological symptoms. Among these patients we detected 10 acute neurologicalcomplications.The most common was acute ischemic stroke in 5 patients and intracranial hemorrhage in 3 patients, two of which were intraventricular hemorrhage. The other complications included a preasumed cytotoxic lesion of corpus callosum in a 18 year old girl and lumbar spondylodiscitis complicated with psoas abcess in a 47 year-old man. Conclusion. In COVID-19 patients severe neurological complications can occur even as a presenting manifestation. Early cytotoxic endothelial injury can be the underlying cause in these patients and should be further studied in larger series in terms of what the susceptibility factors in these patients.
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    Two rare cases during pregnancy: Pregnancy-associated inflammatory sacroiliitis and sacral stress fracture
    (Baycinar Medical Publ-Baycinar Tibbi Yayincilik, 2016) Özgönenel, Levent; Atca, Ali Önder; Üzümcügil, Onat; Basat, Hande; Aytekin, Ebru
    Hip and low back pain is common during pregnancy or postpartum period. Herein, we report two rare cases in whom pain symptoms started during the last trimester of pregnancy. Both patients had similar clinical presentation; however, a meticulous analyses helped us diagnose pregnancy-associated inflammatory sacroiliitis in the first case, and sacral stress fracture in the second case.