Table 1.
Clinical and pathological data and tissue type used in molecular analysis. Abbreviations: FF = fresh frozen; FFPE = formalin‐fixed paraffin‐embedded; WHO = World Health Organization.
| Histology* | Median age (years) | Location | FF | FFPE | Total (%) | |
|---|---|---|---|---|---|---|
| Subtentorial | Supratentorial | |||||
| Nondiffuse gliomas (n = 31) | ||||||
| Pilocytic astrocytoma | 26 | 7 | 6 | 12 | 1 | 13 (41.9) |
| Ganglioglioma | 38 | 0 | 18 | 15 | 3 | 18 (58) |
| Diffuse gliomas (n = 185) | ||||||
| Astrocytoma II | 37 | 0 | 18 | 14 | 4 | 18 (9.7) |
| Astrocytoma III | 45 | 0 | 17 | 13 | 4 | 17 (9.1) |
| Oligodendroglioma II | 41 | 0 | 36 | 29 | 7 | 36 (19.4) |
| Oligodendroglioma III | 49 | 0 | 38 | 31 | 7 | 38 (20.5) |
| Oligoastrocytoma II | 34 | 0 | 23 | 21 | 2 | 23 (12.4) |
| Oligoastrocytoma III | 43 | 0 | 35 | 35 | 0 | 35 (18.9) |
| Glioblastoma grade IV | 58 | 0 | 18 | 16 | 2 | 18 (9.7) |
*
Roman numerals refer to WHO histological grade.