Glioma

: A brain tumor that begin in a glial, or supportive, cell, in the brain or spinal cord. Malignant gliomas are the most common primary tumors of the central nervous system (the brain and spinal cord). They are often resistant to treatment and carry a poor prognosis (have a dismal outlook). "Glia" is the Greek word for "glue".
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Any neoplasm derived from one of the various types of cells that form the interstitial tissue of the brain, spinal cord, pineal gland, posterior pituitary gland, and retina. [G. glia, glue, + -oma, tumor]
- brainstem g. a g., generally an astrocytoma, arising in the medulla, pons, or midbrain.
- gigantocellular g. SYN: giant cell glioblastoma multiforme.
- mixed g. a g. composed of two or more malignant elements, most frequently astrocytoma and oligodendroglioma.
- nasal g. term for a lesion that is probably not a true neoplasm, but a teratoma consisting of glial tissue with reactive astrocytes, ganglionic neurons, and ependymal cells in small nodules at the dorsum of the nose, often with intracranial connections.
- g. of optic chiasm a slow-growing tumor, usually an astrocytoma, of the optic chiasm in children.
- optic nerve g. a g., generally an astrocytoma, involving the optic nerve or chiasm.
- g. of the spinal cord a glial tumor of the spinal cord, commonly an ependymoma; neoplasms of the spinal cord are relatively rare, but gliomas constitute approximately one-fourth of the total.
- telangiectatic g., g. telangiectodes a g. in which the stroma has numerous, conspicuous, frequently dilated small blood vessel s and capillaries, as well as large, endothelium-rimmed lakes of blood.

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gli·o·ma glī-'ō-mə, glē- n, pl -mas also -ma·ta -mət-ə a tumor arising from glial cells
gli·o·ma·tous -mə-təs adj

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n.
any tumour of non-nervous cells (glia) in the nervous system. The term is sometimes also used for all tumours that arise in the central nervous system, including astrocytoma and glioblastoma. Tumours of low-grade malignancy produce symptoms by pressure on surrounding structures; those of high-grade malignancy may be infiltrative.

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gli·o·ma (gli-oґmə) [gli- + -oma] originally, a tumor composed of tissue representing neuroglia in any of its stages of development; the term has been extended to include all the primary intrinsic neoplasms of the brain and spinal cord, including astrocytomas, ependymomas, medulloblastomas, medulloepitheliomas, and others. Called also neurogliocytoma, neuroglioma, and neurospongioma. gliomatous adj

Medical dictionary. 2011.

Look at other dictionaries:

  • Glioma — Classification and external resources Glioma in the left parietal lobe (brain CT scan), WHO grade 2. ICD 10 C71 …   Wikipedia

  • Glioma — Clasificación y recursos externos CIE 10 C71 CIE 9 191 …   Wikipedia Español

  • glioma — m. oncol. Tumor análogo a la neuroglía que afecta a los centros nerviosos y a la retina. Puede estar formado por células estrelladas, granulosas, nucleadas y por material intercelular. Los síntomas que provoca son dolor de cabeza, estupor,… …   Diccionario médico

  • Glioma — Gli*o ma, n. [NL., fr. Gr. ? glue + oma.] (Med.) A tumor springing from the neuroglia or connective tissue of the brain, spinal cord, or other portions of the nervous system. [1913 Webster] …   The Collaborative International Dictionary of English

  • glioma — (n.) type of brain tumor, 1870, medical Latin, lit. glue tumor, from Gk. glia glue + OMA (Cf. oma) …   Etymology dictionary

  • glioma — m. Med. Tumor de las células gliales …   Diccionario de la lengua española

  • glioma — [glī ō′mə; ] also [ glēō′mə] n. pl. gliomata [glī ō′mə tə, glē ōmə tə] or gliomas [ModL < MGr glia (see GLIADIN) + ōma (see OMA)] a tumor of the brain, spinal cord, etc., composed of tissue that normally forms the supporting structure of… …   English World dictionary

  • glioma — ► sustantivo masculino MEDICINA Tumor de los órganos nerviosos y de la retina, de consistencia blanda. * * * glioma. m. Med. Tumor de las células gliales …   Enciclopedia Universal

  • glioma — noun (plural mas; also gliomata) Etymology: New Latin, from glia Date: 1870 a tumor arising from glial cells …   New Collegiate Dictionary

  • glioma — gliomatous /gluy oh meuh teuhs, om euh /, adj. /gluy oh meuh/, n., pl. gliomas, gliomata / meuh teuh/. a tumor of the brain composed of neuroglia. [1865 70; < NL; see GLIA, OMA] * * * ▪ tumour plural  Gliomas, or Gliomata,        a cancerous… …   Universalium

  • glioma — noun A tumour that arises from glial cells in the brain or spinal cord …   Wiktionary

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