P68. Mid-Term Clinical Outcome of Posterior Decompression Without Fusion for Degenerative Lumbar Spondylolisthesis

BACKGROUND CONTEXT: The surgical treatment of degenerative lumbar spondylolisthesis (DLS) still remains controversial in terms of the necessity of additional spinal fusion. In many cases, posterior decompression with spinal fusion can provide acceptable clinical outcomes as we have reported. However, because of its potential risks and complications, we have performed posterior decompression alone for the selected patients such as elderly with...