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Table 1 Created from the Borre et al. [2] classification system

From: Spinal epidural lipomatosis presenting to a U.S. Veterans Affairs pain and rehabilitation department: a report of two cases

  Grade I Grade II Grade III
Dural Sac Diameter ÷ Epidural Fat Diameter 1.49–1 0.99–0.34 ≤0.33
Epidural Fat Diameter ÷ Spinal Canal Diameter 41–50% 51–74% ≥75%