A new technique for controlling intractable pain in lumbar spinal stenosis using steroid injection to ligamentum flavum: A case series.

Background: Lumbar spinal stenosis is a common degenerative disease that causes low back and lower-extremity pain that increases with age. The treatment of lumbar spinal stenosis is either conservative or surgical. ESI is a commonly performed conservative treatment, but evidence of its effectiveness in lumbar spinal stenosis is limited.