background : meningiomas are common benign tumors of the central nervous system. patients with meningiomas achieve postoperative optimal functional recovery, but there is a probability of tumor recurrence months or years after surgical resection. this study aims to evaluate the prevalence of recurrent meningioma and the correlation between tumor recurrence and certain factors. materials and met...

brain tumors in elderly are increasing as the number of people, who comprise the older population, does.about half of the patients with brain tumors appear to be over 60 years of age.in this review article, glioblastoma multiform, as the most common malignant tumor of the central nervous system in elderly is discussed in details of definition, prognosis, diagnosis, treatment and differential di...

Glioblastoma (GBM) is the most aggressive primary brain tumor with poor prognosis and high recurrence rate. The presence of blood–brain barrier (BBB) prevents diagnostic therapeutic drugs from penetrating working in GBM. In traditional surgical treatment, it difficult to completely distinguish boundary between surrounding normal tissue, resulting incomplete resection tumor. Therefore, diagnosis...

Recurrence quantification analysis (RQA) is an acknowledged method for the characterization of experimental time series. We propose a parametric version RQA, pRQA, allowing fast processing spatial arrays series, once each modeled by autoregressive stochastic process. This relies on analytical derivation asymptotic expressions five current RQA measures as function model parameters. By avoiding c...

A 45-yr-old female patient was admitted with one-month history of headache and progressive left hemiparesis. Brain magnetic resonance imaging (MRI) demonstrated a mass lesion in her right frontal lobe. Her brain tumor was confirmed as a small cell glioblastoma. Her follow-up brain MRI, taken at 8 months after her initial surgery demonstrated tumor recurrence in the right frontal lobe. Contrast-...

frequency of common etiologies of adult onset epilepsy is different in various studies. the aim of this study is to evaluate the frequency of common ‎etiologies of late adult onset epilepsies. ‎ all patients referred to razi and imam khomeini hospitals ‎in the year 2003 with at least two seizure attacks beginning after age of 50 were evaluated. in the majority of cases neuroimaging, electroence...

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purpose: to report a case of unilateral severe visual loss and bilateral optic disc cupping secondary to brain metastasis of bronchogenic carcinoma patient and findings: a 48 year-old woman presented with severe visual loss of left eye without redness or pain or any systemic findings .clinical findings included decreased visual acuity of left eye to 4 m cf and (+3) positive marcus-gunn reflex ....