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Oligoastrocytoma - Wikipedia, the free encyclopedia
Oligoastrocytomas are a subset of brain tumor that present with an appearance of mixed glial cell origin, astrocytoma and oligodendroglioma. Often called a "mixed glioma", about 2.3% of all reported ...
en.wikipedia.org/wiki/Oligoastrocytoma |
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Mixed gliomas Back to top ... Mixed gliomas are graded from 1–4, depending on how abnormal the cells are and their rate of growth. Grade 1 is the least malignant and grade 4 is the most. Grade 1 and 2 tumours may be referred to as low-grade tumours and 3 and 4 as high-grade.
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Mixed gliomas diagnosis and treatment options at Mayo Clinic. ... Mixed gliomas are brain tumors that have more than one type of brain cell, including astrocytes, ependymal cells and/or oligodendrocytes. The most common site for a mixed glioma is the cerebrum, the main part of the brain.
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More on Mixed Gliomas ... Return to Mixed Gliomas Overview ... A mixed glioma is a malignant tumor that contains more than one of these cell types. The most common site for a mixed glioma is the cerebrum, the main part of the brain. Like other malignant tumors it may spread to other parts of the brain.
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Mixed gliomas are generally treated for the most anaplastic (cancerous) type of cell found in the tumor. For example, in the case of a tumor composed of an anaplastic astrocytoma and a low-grade oligodendroglioma, the treatment would be based on the anaplastic astrocytoma – the more aggressive of the two cell types.
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At present, the significance of these mixed lesions is not known. Presumably, the application of markers for specific glia will continue to define the incidence and character of mixed gliomas, and careful correlative clinical studies will establish their prognostic significance.
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BACKGROUND: Low-grade oligodendrogliomas and mixed gliomas can be indolent and remain unchanged for years. Optimal timing and effectiveness of initial treatment is uncertain and therapy can be associated with toxicity.
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(Refer to the Mixed Gliomas section in the Classification section of this summary for more information.) ... Kyritsis AP, Yung WK, Bruner J, et al.: The treatment of anaplastic oligodendrogliomas and mixed gliomas. Neurosurgery 32 (3): 365-70; discussion 371, 1993. [PUBMED Abstract];
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The Medscape Journal ... Allergy & Clinical Immunology ... Diabetes & Endocrinology...
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A Patient's Reference Manual ... SECTION 1 What is a brain tumor? ... SECTION 2 What are the parts of the brain and what does each part do?
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