نتایج جستجو برای: magnum meningiomas
تعداد نتایج: 4586 فیلتر نتایج به سال:
BACKGROUND Tissue invasion or tissue infiltration are clinical behaviors of a poor-prognosis subset of meningiomas. We carried out proteomic analyses of tissue extracts to discover new markers to accurately distinguish between infiltrative and noninfiltrative meningiomas. METHODOLOGY/PRINCIPAL FINDINGS Protein lysates of 64 different tissue samples (including two brain-invasive and 32 infiltr...
What Greek can tell us about the remaking of verb endings • i could not have not written this piece, since i could not imagine not honoring the memory of Tassos Christidis, my first and best Greek friend and a giant on the contemporary Greek linguistic scene for some three decades. at the same time, though, i am deeply saddened, as i write this, knowing that it is one paper of mine on Greek tha...
A case of a Chiari malformation with an extraordinarily thick occipital bone is described. The thick occipital bone might make the posterior fossa narrow with consequent herniation of the cerebellar tonsils to the foramen magnum and formation of a syrinx. At dural plasty, well-developed marginal and occipital sinuses should be deliberately handled with the preservation of normal venous drainage...
CONTEXT Lymphangioleiomyomatosis (LAM), a cystic lung disease associated with progressive respiratory failure, is found predominantly in women of childbearing age and therefore has been treated with progesterone and other hormonal agents. However, meningiomas have progesterone receptors, and progesterone is believed to be a mitogen for meningioma cells in culture. Since 30% to 40% of patients w...
Background Recent studies have reported mutations in the telomerase reverse transcriptase promoter (TERTp) in meningiomas. We sought to determine the frequency, clonality and clinical significance of telomere gene alterations in a cohort of patients with progressive/higher-grade meningiomas. Methods We characterized 64 temporally- and regionally-distinct specimens from 26 WHO grade III mening...
BACKGROUND AND PURPOSE Atypical and malignant meningiomas are uncommon tumors with aggressive behavior and higher mortality, morbidity, and recurrence compared with benign tumors. We investigated the utility of diffusion-weighted (DW) MR imaging to differentiate atypical/malignant from benign meningiomas and to detect histologic dedifferentiation to higher tumor grade. MATERIALS AND METHODS W...
Primary extradural meningiomas presenting as scalp swelling is uncommon. Their diagnosis by fine needle aspiration is rare as majority of the lesions are hyperostotic. Primary intraosseus meningiomas involving the skull constitute only about 2% of meningiomas and are often mistaken for other primary or secondary bone tumors. The authors report a case of primary calvarial meningioma involving th...
Aim: To provide basic osteometric data of the following diameters anteroposterior, transverse, right and left oblique, and shape of human foramen magnum in Indian skulls and CT images. A total of 100 adult human skulls from the Department of Anatomy and 100 CT Brain images taken in the Department of Radiology, Mahatma Gandhi Medical College and RI, Pondicherry were evaluated. Methodology: Maxim...
Meningiomas are the second most common brain tumors in adults, and meningiomas exhibit a tendency to invade adjacent structures. Compared with high-grade gliomas, little is known about the molecular changes that potentially underlie the invasive behavior of meningiomas. In this study, we examined the expression and function of the membrane alanyl-aminopeptidase [mAAP, aminopeptidase N (APN), CD...
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