Percutaneous Endoscopic Transforaminal Lumbar Interbody Fusion for the Treatment of Lumbar Spinal Stenosis: Preliminary Report of Seven Cases with 12-Month Follow-Up

Figure 4

Titanium parallel expandable cage. (a) Holistic view of the cage when unexpanded. (b) Holistic view of the cage when expanded. (c) Unexpanded cage under fluoroscope. (d) Adequately expanded cage under fluoroscope.

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