Medulloblastoma staging
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Medulloblastoma staging On the Web |
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American Roentgen Ray Society Images of Medulloblastoma staging |
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Risk calculators and risk factors for Medulloblastoma staging |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]
Overview
The staging of medulloblastoma is based on the modified Chang staging system.[1]
TNM Classification of Medulloblastoma
T: Primary Tumor
| T | Description |
| TX | Primary tumor cannot be assessed |
| T0 | There is no evidence of primary tumor |
| T1 | Tumor size <3 cm in diameter |
| T2 | Tumor size ≥3 cm in diameter with no evidence of extension |
| T3a | Tumor size >3 cm in diameter with extension into aqueduct of Sylvius or foramen of Luschka |
| T3b | Tumor size >3 cm in diameter with definite spread into the brain stem |
| T4 | Tumor size >3 cm in diameter with extension past aqueduct of Sylvius or down past foramen magnum |
N:Regional Lymph Nodes
An N classification cannot be applied to medulloblastoma.
M: Distant Metastasis
| M | Description |
| M0 | No evidence of metastasis |
| M1 | Microscopic tumor cells presemt in the cerebrospinal fluid |
| M2 | Gross nodular seeding present intracranially beyond the primary site |
| M3 | Gross nodular seeding present in the spinal subarachnoid space |
| M4 | Metastasis present outside the cerebrospinal axis |
References
- ↑ Harisiadis L, Chang CH (1977). "Medulloblastoma in children: a correlation between staging and results of treatment". Int J Radiat Oncol Biol Phys. 2 (9–10): 833–41. PMID 597384.