1naresh
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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