Study population characteristics (age, tumour location, tumour grade)
| Total (n=710) | % | |
| Age (years) | ||
| Mean±SD | 7.4±4.9 | |
| Median (IQR) | 6.6 (8.1) | |
| Age group | ||
| Under 5 | 267 | 37.6 |
| 5–11 | 287 | 40.4 |
| 12–18 | 156 | 22.0 |
| Tumour location* | ||
| Brainstem | 71 | 10.1 |
| Central | 222 | 31.7 |
| Cerebellum | 249 | 35.5 |
| Cerebral hemisphere | 159 | 22.7 |
| Tumour grade | ||
| High grade | 257 | 35.8 |
| Low grade | 392 | 55.5 |
| Unknown/not able to assign tumour grade | 61 | 8.7 |
| Tumour histology† | ||
| Low-grade gliomas | 231 | 33.5 |
| High-grade gliomas | 63 | 9.1 |
| Optic pathway glioma | 36 | 5.2 |
| ATRT | 28 | 4.1 |
| Choroid plexus tumours | 17 | 2.5 |
| Craniopharyngioma | 43 | 6.2 |
| Diffuse intrinsic pontine glioma (imaging diagnosis) | 35 | 5.1 |
| Ependymoma | 48 | 7.0 |
| Germ cell tumours | 23 | 3.3 |
| Meningioma | 3 | 0.4 |
| Pituitary adenoma | 5 | 0.7 |
| PNET—medulloblastoma | 94 | 13.6 |
| PNET—pineoblastoma and PNET—supratentorial | 34 | 4.9 |
| Other | 29 | 4.2 |
*Nine cases with missing data were not included in the table.
†Cases with unknown histology, for example, failed or not biopsied, no formal diagnosis yet or missing data (n=21), were not included in the table.
ATRT, atypical teratoid rhabdoid tumour; PNET, primitive neuroectodermal tumour.