The Canadian Preoperative Prediction Rule for Hydrocephalus (CPPRH) is a score used to estimate the probability of persistent postoperative hydrocephalus in children with a tumor in the posterior fossa1.
| Predictor | Points |
|---|---|
| Age < 2 years | 3 |
| Presence of papilledema | 1 |
| Moderate/severe hydrocephalus | 2 |
| Brain metastases | 3 |
| Preoperative presumptive tumor diagnosis | |
| Medulloblastoma | 1 |
| Ependymoma | 1 |
| Dorsal exophytic brainstem glioma | 1 |
| Maximum possible points | 10 |
Calculated probability of persistent postoperative hydrocephalus at 6 months2:
| CPPRH Score | Probability |
|---|---|
| 0 | 0,071 |
| 1 | 0,118 |
| 2 | 0,191 |
| 3 | 0,293 |
| 4 | 0,422 |
| 5 | 0,562 |
| 6 | 0,693 |
| 7 | 0,799 |
| 8 | 0,875 |
| 9 | 0,925 |
| 10 | 0,956 |
Figure
References