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MRI grading of lumbar spinal epidural lipomatosis from Borré et al. [1].
| Grade | DuS/EF index | EF/SpiC index (%) | Observation |
|---|---|---|---|
| Normal 0 | ≥1.5 | 40 | Normal amount of epidural fat |
| Grade 1 | 1.49–1 | 41–50 | Mild overgrowth of epidural fat |
| Grade 2 | 0.99–0.34 | 51–74 | Moderate overgrowth of epidural fat |
| Grade 3 | ≤0.33 | 75 | Severe overgrowth of epidural fat |
DuS = dural sac; ES = epidural fat; SpiC = spinal canal.
