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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In our study, IDH1 (R132H) expression was detected in 23 (92%) oligodendrogliomas cases, 12 (80%) anaplastic oligodendrogliomas cases, 1 (100%) oligodendrogliomas NOS case, 12 (85.7%) A cases, 3 (75%) anaplastic astrocytoma cases, and 1 (100%) anaplastic oligoastrocytomas case.
Total (n = 31) Age (years) Mean [+ or -] SD 44.2 [+ or -] 18.5 Median 44 Range 5-71 Male: female 16:15 Group A (benign) (n = 12) Age (years) Mean [+ or -] SD 32.2 [+ or -] 10.0 Median 33.5 Range 5-46 Male : female 7:5 Diagnosis Astrocytoma grade II or less/low-grade glioma 11 Brain stem glioma 1 Group B (malignant) (n = 19) Age (years) Mean [+ or -] SD 56.7 [+ or -] 16.8 Median 60 Range 14-71 Male : female 9:10 Diagnosis Glioblastoma multiforme 7 Glioblastoma multiforme, recurrence 10 Anaplastic astrocytoma, grade 3 2 Table 2: SUVmax and T/N ratios of MeAIB- and MET-PET study in patients with brain tumors.
Current first-line therapy for anaplastic astrocytoma is surgery followed by treatment with temozolomide.
Mutants: 1 DA, 4 AA, 10 GBM Steinbok et al, Unilateral: 42 cases were (21) 2016 reviewed; 12 PA, 4 DA, 2 GG, 2 E, 2 N, 2 pilomyxoid astrocytoma, 9 AA, 3 GBM, 1 AG, 1 germinoma Bithalamic: 1 PA, 3 DA, 2 AA, 3 GBM, 1 O Aboian et al, 6 cases had H3K27M mutation (22) 2017 Abbreviations: A, astrocytoma; AA, anaplastic astrocytoma; AE, anaplastic ependymoma; AO, anaplastic oligodendroglioma; ATRT, atypical teratoid rhabdoid tumor; DA, low-grade diffuse astrocytoma; E, ependymoma; GBM, glioblastoma; GG, ganglioglioma; HGA, high-grade astrocytoma; JPA, juvenile pilocytic astrocytoma; LGA, low-grade astrocytoma; LI, labeling index; N, neurocytoma; O, oligodendroglioma (low grade); OA, oligoastrocytoma; PA, pilocytic astrocytoma; PNET, primitive neuroectodermal tumor.
Expression level of miR-124a was significantly decreased in anaplastic astrocytoma and GBMs, when compared to normal brain tissue [77], and also in oligodendroglioma [78].
(1, 5) When increased cellularity, mitosis, and nuclear atypia are present, it is classified as anaplastic astrocytoma (WHO grade III).
Jake's mom, 38-year-old Malini Mayerhauser, has a form of brain cancer called anaplastic astrocytoma Grade 3.
Transformation of intracranial anaplastic astrocytoma associated with neurofibromatosis type I into gliosarcoma: case report.
[36], who reported significant increase of IL-10 serum levels in patients with anaplastic astrocytoma and glioblastoma.
The most widely used system is the World Health Organization (WHO) classification (1979, 1993, 2000, and 2007) that grades astrocytomas (I-IV) based on cytological atypia, mitotic activity, vascular proliferation, and necrosis: pilocytic astrocytoma (grade I), diffuse astrocytoma (grade II), anaplastic astrocytoma (grade III), and glioblastoma (grade IV).
Malignant gliomas include WHO grade III: anaplastic astrocytoma, anaplastic oligodendroglioma and anaplastic oligoastrocytoma, and WHO grade IV: glioblastoma and gliosarcoma.