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Wednesday, June 19 2013 @ 06:48 PM CDT
NeuroPath
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The subependymal giant cell astrocytoma most commonly occur in the wall of the lateral ventricle near the foramen of Monro.Microscopically, SEGA are characterized by heterogeneous cell populations predominantly composed of variably sized astrocytic appear
Subependymal Giant Cell Astrocytoma
Saturday, August 02 2008 @ 05:50 PM CDT
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Progressive multifocal leukoencephalopathy (PML), also known as progressive multifocal leukoencephalitis, is a rare demyelinating and usually fatal viral disease that is characterized by progressive damage or inflammation of the white matter of the brain
Inflammatory Progressive Multifocal Leukoencephalopathy
Saturday, August 02 2008 @ 05:50 PM CDT
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Myxopapillary Ependymomas are slowly growing gliomas with preferential manifestation in young adults and are almost exclusively located in the conus medullaris, cauda equina, filum terminale region of the spinal cord. Myxopapillary ependymoma occur almost exclusively in the region of conus medullaris, cauda equina and filum terminale. Microscopically: Myxopapillary ependymomas are characterised by cuboidal or elongated, GFAP expressing cells which are radially arranged in a papillary manner around vascular stroma cores. Cytokeratins are not expressed. Myxopapillary ependymomas are WHO grade I. Anaplastic variants are extremely rare.
Myxopapillary Ependymoma
Saturday, August 02 2008 @ 05:50 PM CDT
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GP is composed of epithelioid cells with an endocrine growth pattern, spindle cells, and ganglion cells
Gangliocytic Paraganglioma
Saturday, August 02 2008 @ 05:50 PM CDT
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Hemangioblastomas of the CNS are the most common tumor in von Hippel-Lindau disease and can be found in 60 to 80% of all patients with the disease.The overall mean age at presentation for CNS hemangioblastomas in von Hippel-Lindau disease is 33 years.The
Hemangioblastoma
Saturday, August 02 2008 @ 05:50 PM CDT
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The tumor cells are often arranged in a patternless patern. The cells are polygonal in shap and have clear cytoplasm.
Clear Cell Meningioma
Saturday, August 02 2008 @ 05:49 PM CDT
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Pilocytic astrocytomas are slow-growing astrocytic tumors that typically show a biphasic histopathological arrangement. The macroscopic appearance of pilocytic astrocytoma varies with its location within the central nervous system. Tumors of the cerebellum and cerebral hemisphere are typically well-circumscribed, cystlike masses with a discrete mural nodule, whereas those arising in the hypothalamus and optic chiasm tend to be large, soft, cystlike masses.At histologic examination, pilocytic astrocytoma classically manifests in a noteworthy biphasic pattern composed of a combination of loose glial tissue punctuated by numerous vacuoles, microcysts, occasional macrocysts, and compacted piloid tissue. The piloid tissue component is composed of dense sheets of elongated bipolar cells that demonstrate fine fibrillary (hairlike) processes, a highly distinctive feature, and typically an abundance of Rosenthal fibers.In contrast, the multipolar cells of the loose glial tissue, frequently called protoplasmic astrocytes, are much less fibrillated and commonly are intermixed with degenerative products of astrocyte formation, known as eosinophilic granular bodies or “protein droplets”. These “classic” but nonspecific granular bodies are believed to indicate slow growth and low histologic grade and are associated with a favorable prognosis.
Pilocytic Astrocytoma
Saturday, August 02 2008 @ 05:49 PM CDT
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Variant characterized by the abundance of psammoma bodies, which can form confluent masses between which lie islands of meningothelial or fibroblastic-like cells. This subtype of meningioma occurs predominantly in the spinal cord.
Psammomatous Meningioma
Saturday, August 02 2008 @ 05:49 PM CDT
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This is the most common cell type seen in all meningioma. The tumour has large, ill-defined cells with abundant cytoplasm. Numerous whorls are formed by several flattened cells wrapped around a large round cell. Psammomas bodies sometimes occur w
Meningotheliomatous Meningioma
Wednesday, November 16 2005 @ 02:25 PM CST
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Choroid Plexus Carcinoma
Saturday, August 02 2008 @ 05:49 PM CDT
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A pleomorphic xanthoastrocytomas is a rare tumor thought to arise from a type of cell of the central nervous system known as a glial cell. These tumors likely originate from a specific type of glial cell known as an astrocyte. Histology: A frightening
Pleomorphic Xanthoastrocytoma
Saturday, August 02 2008 @ 05:49 PM CDT
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Primary pineal tumour arising along with pineoblastoma from neuroepithelial cells of the pineal gland. Compared with pineoblastoma it is composed of more differentiated cells. Histology: Small cells with delicate processes that form small fibrillary f
Pineocytoma
Saturday, August 02 2008 @ 05:49 PM CDT
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