نتایج جستجو برای: brain tumor
تعداد نتایج: 871781 فیلتر نتایج به سال:
Background: Most studies have shown that there are association between the development and malignancy of brain tumors and tumor suppressor genes and oncogenes. The aim of this project was to investigate the P53 gene mutations in exon 8 in patients with astrocytoma type’s brain tumor. Methods: In this present survey, The DNA isolation from 30 samples of brain tissue was done by phenol-c...
background diffusion-weighted imaging (dwi) is a form of magnetic resonance imaging (mri) based on measuring the random brownian motion of water molecules within the biological tissues and is particularly useful in tumor characterization. objectives the purpose of this study was to evaluate the diagnostic value of dw mri and the apparent diffusion coefficient (adc) for preoperative grading of a...
tuberculoma is one of the causes of the space occupying lesions in brain. its manifestations can mimic many diseases such as tumor, vasculitis, and multiple sclerosis.a patient with brain tuberculoma secondary to epidymitis is reported. his symptoms and signs were verysimilar to the patients with multiple sclerosis. the physicians must keep in mind this disease in the differentialdiagnosis with...
Introduction: Based on the findings of studies, brain tumors result in the decline of pediatric performance and quality of life. Therefore, this study aims at investigating different epidemiologic, demographic and clinical factors in children and adolescents with brain tumors in Arak, Iran. Methods: This case–control study was conducted on 50 children with brain tumor (with the age range of 1....
Background: One of the leading causes of death is brain tumors. Accurate tumor classification leads to appropriate decision making and providing the most efficient treatment to the patients. This study aims to optimize brain tumor MR images classification accuracy using optimal threshold, PCA and training Adaptive Neuro Fuzzy Inference System (ANFIS) with different repetitions.Material and Meth...
Abstract The Intraparenchymal schwannomas are very rare tumors with only 52 reported cases . We describe a 38 years old man with eight months history of poorly controlled seizures despite of medical therapy. On brain CT scan a 1.5 x 1.5 cm hypodense enhancing lesion was seen in right posterior-inferior frontal lobe. On brain MRI the lesion was hypointense in T1 and hyperintense in T...
Introduction: Behcet's disease is a chronic disease with multisystem involvement characterized clinically by oral and genital aphthae, cutaneous lesions and ophthalmologic, neurologic and gastrointestinal manifestation. Nervous system involvement occurs in 5.3 – 30% of patients, mostly in brain stem and basal ganglia. The common manifestations are pyramidal signs, central nervous plegia, pseudo...
Tuberculoma is one of the Causes of the space occupying lesions in brain. Its manifestations can mimic many diseases such as tumor, vasculitis, and multiple sclerosis.A Patient with brain tuberculoma secondary to epidymitis is reported. His symptoms and signs were verysimilar to the patients with multiple sclerosis. The physicians must keep in mind this disease in the differentialdiagnosis with...
Background and Aim: Brain tumors have remained as a significant cause of morbidity and mortality and are often refractory to treatment. The grading of brain tumor has an important implication in clinical management. Currently, magnetic resonance spectroscopy (MRS) is an important dimension in evaluating metabolites and grading brain tumors. The aim of this study is to evaluate metabolites in br...
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