Structural Preservation Percutaneous Endoscopic Lumbar Interlaminar Discectomy for L5-S1 Herniated Nucleus Pulposus

Figure 4

Radiological results using MRI. (a) and (b) Categorized as complete. Pre- and postoperative MRI showing the preserved ligamentum flavum, complete pathologic disc removal, and complete annulus restoration. (c) and (d) Categorized as sufficient. Pre- and postoperative MRI showing the preserved ligamentum flavum, complete pathologic disc removal, and incomplete annulus restoration.

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(b)

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