Vasogenic edema scale
| Edema Grade | Description | Points |
|---|---|---|
| Grade 1 | Cortex edema, limited subcortical white matter edema or both Involved regions nonconfluent Slight local cortex mass effect/distortion due to edema | 1 |
| Grade 2 | White matter edema slightly greater in thickness than cortex edema White matter edema extends into deep white matter Primarily without wide medial-to-lateral extension Some involved regions occasionally confluent Local cortical mass effect/distortion due to edema | 2 |
| Grade 3 | White matter edema substantially greater in thickness than cortex edema Some limited and focal extension to ventricular surface Developing wide medial-to-lateral extension Involved regions partially confluent Moderate local cortex mass effect/distortion due to the edema | 3 |
| Grade 4 | White matter edema substantially thicker than cortex edema Involved regions substantially extend to ventricular surface Diffuse wide medial-to-lateral extension Involved regions almost completely confluent No ventricular distortion due to the edema | 4 |
| Grade 5 | White matter edema severe and dominates cortex edema Involved regions fully confluent and continuous Diffuse wide medial-to-lateral extension Fully extends to the ventricular surface Ventricular deformity due to the edema | 5 |