lumbar spinal stenosis l4 l5foraminal stenosis l5 s1 symptomsl4 and l5 laminectomysevere central canal stenosis l4 l5l4 l5 severe spinal canal stenosissevere spinal stenosis l4 l5l4 l5 spinal stenosis surgerydecompression laminectomy l4 l5laminectomy l4 l5 recoverybilateral laminectomy l4 l5l4 l5 laminectomy and discectomyanterior spondylolisthesis of l4 on l5
