MR imaging scoring criteriaa
| Tumor Feature | Scores |
|---|---|
| Edema | None or mild (1); smaller than tumor volume (2); larger than tumor volume (3) |
| Mass effect | Subarachnoid space effacement (1); ventricular system compression (2); midline shift (3) |
| Contrast enhancement | None (1); mild or nodular (2); marked and heterogeneous (3) |
| Borders | Well-defined (1); poorly defined (2) |
| Heterogeneity | Homogeneous (1); heterogeneous on T2WI (2); heterogeneous on T1WI and T2WI (3) |
| Necrosis/cyst | None (1); involving less than half the volume of the tumoral mass (2); involving more than half the volume of the tumoral mass (3) |
| Hemorrhage | None (1); present (2) |
| Flow void | None (1); present (2) |
↵a The numbers in parentheses are the scores assigned for the grades of tumor features.