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Reported molecular genetic testing
| By Tumor Type | |
| Anaplastic oligodendroglioma | 95% |
| Obtain in 76%–100% of patients | 75% |
| Obtain in 51%–75% of patients | 5% |
| Obtain in 1%–50% of patients | 15% |
| Never obtain | 5% |
| Mixed glioma (oligoastrocytoma) | 92% |
| Anaplastic astrocytoma | 33% |
| Low-grade oligodendroglioma | 14% |
| Glioblastoma | 7% |
| By Methodology | |
| FISH | 48% |
| LOH | 29% |
| Both FISH and LOH | 6% |
| Unsure/not answered | 17% |
Abbreviations: FISH, fluorescence in situ hybridization; LOH, loss of heterozygosity.
