Metastatic staging of medulloblastoma and other CNS embryonal tumours.
The Medulloblastoma / CNS Embryonal — Chang M-Stage is a oncology scoring tool used in paediatric practice. Metastatic staging of medulloblastoma and other CNS embryonal tumours. It scores 1 criteria and interprets the total across 4 bands, so the number always arrives with the severity it implies rather than on its own. In PediAid each criterion is shown as a labelled option with the weight it carries, so the total can be checked rather than taken on trust.
1. They are Metastatic status.
The total is interpreted as: 1 stage or more - M0 - standard risk (if resected): m0 with <1.5 cm² residual tumour and age ≥3 years = standard risk. Craniospinal radiotherapy plus chemotherapy; 2 stage or more - M1 - high risk: m1 - positive CSF cytology places the patient in the high-risk group; 3 stage or more - M2-M3 - high risk: gross nodular seeding (intracranial or spinal) - high-risk disease requiring intensified therapy; 5 stage or more - M4 - high risk, extraneural: m4 - extraneural metastasis; rare and carries the poorest prognosis.
No. It is a structured way to record and communicate severity. A clinician concerned about a child should act on that concern regardless of the total.
Risk stratification also uses extent of resection (residual <1.5 cm²), age (<3 years) and molecular subgroup (WNT, SHH, Group 3, Group 4).
Yes. Score definitions are bundled with the PediAid app, so the score computes without a connection.