astrocytoma

astrocytoma
n.
a brain tumour derived from non-nervous cells (glia), which – unlike the neurones – retain the ability to reproduce themselves by mitosis. All grades of malignancy occur, from slow-growing tumours whose histological structure resembles normal glial cells, to rapidly growing highly invasive tumours whose cell structure is poorly differentiated (see glioblastoma). In adults astrocytomas are usually found in the cerebral hemispheres but in children they also occur in the cerebellum.

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  • astrocytoma — n. a tumor of nervous tissue derived from interstitial cells, in which the cells are relatively well differentiated and resemble astrocytes. The occur primarily in the crebrum and cerebellum. Stedman [PJC] …   The Collaborative International Dictionary of English

  • Astrocytoma — vgl. Astrozytom …   Das Wörterbuch medizinischer Fachausdrücke

  • Astrocytoma — Caption = Two images the above of which shows a normal brain and the below shows astrocytoma. OMIM = 137800 OMIM mult = MedlinePlus = eMedicineSubj = med eMedicineTopic = 2693 DiseasesDB = 29449 Astrocytomas are primary central nervous system… …   Wikipedia

  • astrocytoma fibrillare — fibrillary astrocytoma an astrocytoma whose cells resemble fibrous astrocytes, usually a Grade I or Grade II astrocytoma found in the cerebrum of an adult, but occasionally occurring in the brainstem or cerebellum. A minority are malignant and… …   Medical dictionary

  • astrocytoma — noun (plural mas; also astrocytomata) Etymology: New Latin Date: circa 1923 a nerve tissue tumor composed of astrocytes …   New Collegiate Dictionary

  • astrocytoma — A neuro ectodermal tumour (glioma) arising from astrocytes. Probably the commonest glioma, it has a tendency to become anaplastic …   Dictionary of molecular biology

  • astrocytoma — as·tro·cy·to·ma (ăs trō sī tōʹmə) n. pl. as·tro·cy·to·mas or as·tro·cy·to·ma·ta ( mə tə) A malignant tumor of nervous tissue composed of astrocytes. * * * …   Universalium

  • astrocytoma — noun A cancer of the brain that originates in astrocytes …   Wiktionary

  • astrocytoma — A glioma derived from astrocytes. [G. astron, star, + kytos, cell, + oma, tumor] anaplastic a. intermediate grade a. characterized by increased cellularity, nuclear pleomorphism, mitoses, and variable …   Medical dictionary

  • astrocytoma — n. tumor which is composed of astrocytes and forms in the brain or nervous system (Medicine) …   English contemporary dictionary

  • astrocytoma — as·tro·cy·to·ma …   English syllables

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