astrocytoma /as·tro·cy·to·ma/ (as″tro-si-to´mah) a tumor composed of astrocytes; the most common type of primary brain tumor and also found throughout the central nervous system, classified on the basis of histology or in order of malignancy (Grades I–IV).
astrocytoma
astrocytoma [as″tro-si-to´mah]
astrocytoma (as´trōsītō´m
),
as·tro·cy·to·ma ( s tr -s -t m )n. pl. as·tro·cy·to·mas or as·tro·cy·to·ma·ta (-m -t) A malignant tumor of nervous tissue composed of well-differentiated astrocytes. Also called grade I astrocytoma. |
astrocytoma
pl. astrocytomas, astrocytomata [as′trōsītō′mə]
Etymology: Gk, aster + kytos + oma
a primary tumor of the brain composed of astrocytes and characterized by slow growth, cyst formation, invasion of surrounding structures, and often development of a highly malignant glioblastoma, within the tumor mass. Complete surgical resection of an astrocytoma may be possible early in the development of the tumor. It may also be treated with radiation therapy postoperatively or if surgery is not possible. Also called astrocytic glioma.
astrocytoma [as″tro-si-to´mah]
a tumor composed of astrocytes; classified in order of malignancy as: Grade I, consisting of fibrillary or protoplasmic astrocytes; Grade II (astroblastoma); Grades III and IV (glioblastoma multiforme).
astrocytoma (as´trōsītō´m
),n a primary tumor of the brain composed of astrocytes and characterized by slow growth, cyst formation, invasion of surrounding structures, and often, the development of a highly malignant glioblastoma within the primary tumor mass.
astrocytoma
a common intracranial tumor composed of astrocytes; classified in order of malignancy as differentiated or undifferentiated groups.
gemistocytic astrocytoma
comprises gemistocytic astrocytes, plump or swollen astrocytes or gemistocytes.
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