Abstract
“Posterior Kantenabtrennung” is a rare disorder. Recently, we have experience an operation of the disorder. The chief complaint of the patient was low back pain radiating to the leg. On phsical examination, straight leg raising test was positive at 30 degrees on the right. MMT of the right anterior tibialis was graded as poor. Sesation and reflex were intact. Radiographic examination demonstrated a scleosis at the inferior border of L4 as well a bony fragment projecting posteriorly into the spinal canal. Myelography revealed complete blockage just the L4-L5 interspace. Discography showed Schmorl's nodes of L4 and L5 vertevral bodies. Computed Tomography disclosed equally divided two bony fragments, associated with the postero-inferior angle defect of L4 vertevral body. These two bony fragments detached from L4 vertevral body were partially removed by performing laminectomy.
