| Characteristic | Supratentorial PNET | Medulloblastoma |
| Prevalence | <2% pediatric CNS tumors | ~20% pediatric CNS tumors |
| Mean age at presentation | 3 years | 5 years |
| Sex | Equal incidence | Males>females |
| Imaging | Heterogeneous enhancement
Distinct border Poorly differentiated |
Homogeneous enhancement |
| Histopathology | Neuroepithelial cells
Small round nuclei |
Same |
| Molecular biology | No specific chromosomal abnormalities | 17p deletion
17q addition |
| Metastasis | 5 – 39% | 40 – 60% |
| Treatment | Surgery
Craniospinal XRT Chemotherapy |
Same |
| 3-year progression-free survival | 45 – 49% | >80% |