Browsing by Subject "magnetic resonance angiography"
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Item Neuro-otologic applications of MRI(2007) Bulakbaşi N.; Pabuşçu Y.Magnetic resonance imaging (MRI) has increasingly new applications in neuro-otology. The aim of this review was to summarize MRI applications in neuro-otology and make a correlation between neuro-otologic anatomy and MR images. Different MRI techniques have been described in the imaging of different neuro-otologic structures. In particular, we discuss the effectiveness, indications, and techniques of MRI in the demonstration of neuro-otologic tracts and their related pathologies, MRI should be the first choice imaging modality for the evaluation of retro-cochlear pathologies. © Turkish Society of Radiology 2007.Item Reno-vascular hypertension in childhood: A nationwide survey(2007) Bayazit A.K.; Yalcinkaya F.; Cakar N.; Duzova A.; Bircan Z.; Bakkaloglu A.; Canpolat N.; Kara N.; Sirin A.; Ekim M.; Oner A.; Akman S.; Mir S.; Baskin E.; Poyrazoglu H.M.; Noyan A.; Akil I.; Bakkaloglu S.; Soylu A.Renovascular disease accounts for 8-10% of all cases of paediatric hypertension, whereas, in adults, its incidence is approximately 1%. The Turkish Paediatric Hypertension Group aimed to create the first registry database for childhood renovascular hypertension in Turkey. Twenty of the 28 paediatric nephrology centres in Turkey responded to the survey and reported 45 patients (27 girls, 18 boys) with renovascular hypertension between 1990 and 2005. The age at presentation ranged from 20 days to 17 years. The mean blood pressure at the diagnosis was 169/ 110 mmHg. Chief complaints of symptomatic patients were headache (38%), seizure (18%), epistaxis (4%), growth retardation (4%), cognitive dysfunction (4%), polyuria (2%), palpitation (2%), and hemiplegia (2%). Renovascular hypertension was found incidentally in 11 children. The diagnosis of renovascular hypertension was established with conventional angiography in 39 patients, MR angiography in three, CT angiography in two, and captopril diethylene triamine penta-acetic acid (DTPA) scintigraphy in one patient. Twenty-one children had bilateral renal artery stenosis and 24 had unilateral renal artery stenosis. Of these, 14 (31%) had fibromuscular dysplasia; 12 (27%) Takayasu's arteritis; six (13%) neurofibromatosis; two (5%) Williams syndrome; one (2%) Kawasaki disease; one (2%) mid-aortic syndrome; one (2%) extrinsic compression to the renal artery, and eight (18%) unspecified bilateral renal artery stenosis. Hypertension was controlled with antihypertensive drugs in 17 patients. Percutaneous transluminal angioplasty (PTRA) or surgery had to be performed in 28 patients: PTRA in 16 patients, PTRA + surgery in one patient and surgery in 11 patients (four nephrectomies). The importance of vasculitic disease, especially Takayasu's arteritis, should not be underestimated in children with renovascular hypertension. © IPNA 2007.Item Co-occurrence of internal carotid artery agenesis with multicystic dysplastic kidney(2009) Yilmaz Ovali G.; Tarhan S.; Bayindir P.; Polat M.; Akil I.Congenital absence of Internal Carotid Artery (ICA) is a rare disorder. This anomaly may be an isolated entity or may be associated with other organ, or system anomalies (1). Multicystic Dysplastic Kidney (MCDK) is a congenital mal-development in which the renal cortex is replaced by numerous cysts of multiple sizes. Urologic and non-urologic anomalies may accompany MCDK (2). In this paper, we detail a case of congenital agenesis of ICA and the existence of MCDK. To our knowledge, this is the first of such a case to be reported regarding the co-occurrence of ICA agenesis and MCDK. © TÜBİTAK.Item Rapidly progressive glomerulonephritis in a child with Henoch-Schönlein Vasculitis and familial Mediterranean fever(2009) Sozeri B.; Mir S.; Ertan P.; Kara O.D.; Sen S.Henoch-Schonlein Vasculitis (HSV) is systemic small vessel vasculitis involving the skin, kidney, joints, and gastrointestinal tract. The proportion of patients reported to have renal involvement varies between 20% and 80%. Rapidly progressive glomerulonephritis (RPGN)is rare syndrome in children, characterized by clinical features of glomerulonephritis (GN) and rapid loss of renal function. We present a severe kidney involvement in a 14 year old boy with HSV in who is carring MEFV mutation. A 14 year old boy had developed sudden onset of palpable purpuric rash on his extensor surfaces of lower extremities. He had elevated an erythrocyte sedimentation rate (ESR) (45 mm/h), C-reactive protein (3.74 mg/dl), serum urea 66 mg/dl, serum creatinine 1.8 mg/dl. Also, he had hypocomplementemia. Antinuclear antibody, anti ds DNA, antineutrophil cytoplasmic antibody, anticardiolipine antibodies were negative. Urinalysis revealed macroscopic hematuria and proteinuria with a 24-h urinary protein excretion of 55 mg/m2/h. The renal biopsy specimen showed crescentic and necrotizing glomerulonephritis. He had also M694V/E148Q compound heterozygote mutation. Clinical symptoms and renal failure resolved with intermittant hemodialysis and medical therapy. © 2009 Sozeri et al; licensee BioMed Central Ltd.Item Effectiveness of magnetic resonance angiography in the evaluation of lung perfusion in constrictive bronchiolitis obliterans(2009) Yilmaz Ö.; Savaş R.; Sogut A.; Özkol M.; Yüksel H.Childhood constrictive bronchiolitis obliterans (CBO) is characterized clinically by the persistence of obstructive respiratory symptoms following a prolonged episode of lower respiratory viral infection. The diagnosis depends on the clinical, radiological and laboratory findings. Perfusion defects on scintigraphy may predict the severity. This report describes a 2-year-old girl who presented with a 15-day history of respiratory distress despite treatment. Auscultation of the lungs revealed prolonged expiration and bilateral crepitant rales. CXR revealed bilateral paracardiac infiltration. She improved with a treatment regimen of bronchodilators, systemic steroids and antibiotherapy; however, rales were detected again 10 days after discharge. HRCT of the lung revealed an oligaemic-mosaic pattern, more prominent in the left lung. The diagnosis of CBO was made on the basis of these clinical and radiological findings. Perfusion was normal in the right lung but diffusely decreased in the left lung on perfusion scintigraphy by Tc99m-MAA. Magnetic resonance (MR) angiography source images of the lungs revealed significant but not diffuse perfusion defects in the left lung, in contrast to radionuclide scintigraphy. There were areas of low perfusion in the right lung, which were not evident in radionuclide scintigraphy. The use of source images of MRI angiography of the lungs may be more sensitive and specific for the detection of perfusion defects in patients with CBO and may assist in determining the prognosis. © 2008 Asian Pacific Society of Respirology.Item Symptomatic Spinal Migration of Subarachnoid Hemorrhage due to Ruptured Intradural Vertebral Artery Aneurysm(2015) Ovali G.Y.; Adam G.; Çinar C.; Bozkaya H.; Çalli C.; Kitiş Ö.; Oran I.A 55-year-old patient was admitted to the hospital with severe acute back pain. Thoracolumbar magnetic resonance (MR) imaging showed hemorrhage in subarachnoidal-subdural space. On cranial MR imaging and MR angiography, an aneurysm was suspected in the V4 segment of the right vertebral artery. Angiography showed a fusiform dissecting aneurysm in the V4 segment of right vertebral artery. The final diagnosis was ruptured V4 segment aneurysm with subsequent symptomatic migration of hemorrhage into the spinal subarachnoidal-subdural space. The patient was treated endovascularly by coil occlusion of both the aneurysm and vertebral artery. This rare cause and possible mechanisms for spinal migration of intracranial hemorrhage after aneurysmal rupture is discussed. © 2014 by the American Society of Neuroimaging.Item Manifestation of hashimoto's encephalopathy with psychotic signs: A case presentation(Yerkure Tanitim ve Yayincilik, 2016) Kisabay A.; Balikci K.; Sari S.; Selcuki D.Hashimoto's encephalopathy (HE) is a rare autoimmune disease with unclear pathophysiology, developing on the basis of Hashimoto's thyroiditis (HT), associated with antithyroid antibodies, that presents with autoimmune, neuroendocrine, and neuropsychiatric findings. The disease is characterized by generalized or focal slowing in the EEG, elevated antithyroid antibody titration in the serum, elevated cerebrospinal fluid protein level, and the presence of antithyroid antibodies. HE is known as an autoimmune disorder of the central nervous system. With this feature, it is differentiated from cognitive alterations observed in hypothyroidism or hyperthyroidism. The response to treatment with corticosteroids in line with the autoimmune nature of HE supports this diagnosis. This report shows a case presenting with neuropsychiatric symptoms, elevated antithyroid antibody titration in the serum, and complete response to steroid therapy. A clear indicator for the diagnosis of HE has not yet been found. Therefore, other potential causes need to be considered in the differential diagnosis of this clinical picture until they can be excluded after investigations. With this case report, we want to emphasize that in differential diagnosis of patients presenting with a variety of neuropsychiatric symptoms, Hashimoto's encephalopathy-though being seen quite rarely-should not be disregarded, given the dramatic improvement of patients receiving a correct diagnosis and appropriate treatment.Item Is computed tomography perfusion a useful method for distinguishing between benign and malignant neck masses?(Medquest Communications LLC, 2017) Duzgun F.; Tarhan S.; Ovali G.Y.; Eskiizmir G.; Pabuscu Y.Evaluation of neck masses is frequent in ear, nose, and throat clinics. Successful outcomes associated with neck mass are directly related to rapid diagnosis and accurate treatment for each patient. Late diagnosis of a malignant mass increases the magnitude of morbidity and the rate of mortality of the disease. Although magnetic resonance imaging and computed tomography (CT) examinations are important tools for evaluating head and neck pathologies, they do not allow functional evaluation. For this reason, CT perfusion (CTP) as a method of functional evaluation for distinguishing benign from malignant masses is gaining attention. The utility of CTP for distinguishing between benign and malignant mass lesions was investigated in 35 patients with masses in the neck (11 benign, 24 malignant). CTP was shown to be a useful method for identifying head and neck tumors and blood volume values to enable the differential diagnosis of benign and malignant head and neck tumors.Item Endovascular coil treatment of a coronary artery aneurysm related to polyarteritis nodosa(Turkish Society of Cardiology, 2017) Bayturan Ö.; Tarhan S.; Çöpkıran Ö.; Düzgün F.; Tezcan U.K.[No abstract available]Item Airplane headache: An atypical case with autonomic symptoms and long duration(ASEAN Neurological Association, 2020) Ataç C.; Kısabay Ak A.; Çetin G.; Batum M.; Gökçay F.; Selçuki D.Airplane Headache (AH) which is classified under headache attributed to disorder of homeostasis in International Classification of Headache Disorders (ICHD)-3 is a severe, unilateral, orbitofrontal headache that occurs during and caused by airplane travel. It remits after landing. AH cases with autonomic symptoms had rarely been reported. We present a 35-year-old male complained of five attacks of right-sided, unilateral, orbitofrontal headache accompanied with lacrimation, conjunctival injection and eye redness ipsilaterally, starting 20-30 minutes prior to landing. The headache duration varied between 30-90 minutes. AH diagnosis was made in the light of anamnesis and neurological examination. The secondary causes and primary headaches with autonomic symptoms were ruled out. As far as we know this is the first reported longer duration AH case with autonomic symptoms in the literature. AH is an underdiagnosed headache. We report this atypical AH case to call attention to this rare but treatable headache. © 2020, ASEAN Neurological Association. All rights reserved.Item Reversible lesion of the corpus callosum associated with COVID-19: A case report(ASEAN Neurological Association, 2021) Gemici Y.I.; Tasci I.Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may affect the central nervous system and peripheral nervous system. Major central nervous system manifestations of SARS-CoV-2 infection include seizures, meningoencephalitis, ischemic stroke, anosmia, and hypogeusia. The reversible splenial lesion syndrome was first described in 2004. Although reversible splenial lesion syndrome was initially recognized as a benign phenomenon, a second type of reversible splenial lesion syndrome was identified in later years, which has a poorer prognosis and potentially serious sequela. Reversible splenial lesion syndrome can be caused by numerous etiologies including viruses. In this report, we present a rare case of COVID-19 with reversible splenial lesion, who presented with ataxia and dizziness. © 2021, ASEAN Neurological Association. All rights reserved.Item Ischemic chiasmal syndrome associated with posterior communicating artery (PCoA) and tuberothalamic artery (TA) infarction: a case report(Springer-Verlag Italia s.r.l., 2021) Ataç C.; Ak A.K.; Batum M.; Arı S.; Ovalı G.Y.; Çelebisoy N.Lesions affecting the body of the optic chiasm typically produce bitemporal hemianopia. The blood supply comes from the anterior communicating artery, anterior cerebral, posterior communicating, posterior cerebral, and basilar arteries. We herein report a young patient admitted to the emergency department with acute confusion, left-sided hemiparesis, hemihypoesthesia, and dysarthria. Bitemporal hemianopia was detected after resolution of confusion. On cranial magnetic resonance imaging (MRI), infarction in the right anterolateral thalamus in the territory of tuberothalamic artery (TA) and in posterior chiasma in the territory of the posterior communicating artery (PCoA) was revealed. Cerebral MR angiography showed luminal irregularity of the PCoA. The patient was presented to draw attention to the rare entity ischemic chiasmal syndrome. © 2020, Fondazione Società Italiana di Neurologia.