astrocytoma

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astrocytoma

[‚as·trə‚sī′tōm·ə]
(medicine)
A slow-growing glial tumor made up of cells resembling astrocytes; often it will undergo malignant change and assume the appearance and growth characteristics of a glioblastoma.
References in periodicals archive ?
Various types of histopathologically proven gliomas were astrocytomas 93(64.
For example, astrocytomas harboring IDH mutations are also frequently mutated for ATRX and TP53, whereas oligodendrogliomas frequently show mutations in FUBP1 or CIC.
Embryonal/primitive neuroectodermal/medulloblastoma and pilocytic astrocytomas are the most common tumours before age 9 years, and gliomas grade I to III between 10 and 19 years are common.
Extraneural metastases of astrocytomas and glioblastomas: clinicopathological study of two cases and review of the literature.
20% of oligodendrogliomas can have mass effect and calcification which are not common in astrocytomas.
Renal angiomyolipomas, cardiac rhabdomyomas, and subependymal giant cell astrocytomas are commonly observed in patients with tuberous sclerosis.
The most common histology was GBM (37%) followed by diffuse astrocytomas (15%).
They have a tendency to calcify and can progress into subependymal giant cell astrocytomas, which are histologically indistinguishable from SENs but distinguishable based on their larger size, higher growth rate, and potential for mass effect compared to the relatively static course of SENs [14, 15].
Ten cases harbored a BRAF fusion, including 44% of the pilocytic astrocytoma cases.
Astrocytomas tend to expand the cord eccentrically (Figure 1).
Low-grade tumors, including low-grade astrocytomas, oligodendrogliomas and mixed tumors, have been found over time to progress to high grade tumors.