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Spinal Surgery - L4-L5 and L5-L6 (Anomaly) Disc Herniations with Microdiscectomy Procedure. Labels show where the L4-5 intervertebral disc herniation causes severe stenosis of the right neural foramen and spinal nerve root. Displays the herniated L4-5 disc with neural impingement. Also depicts the chronic pain radiating into the right leg via the sciatic nerve. The final three graphics show the surgical discectomy and decompression of the spinal nerve root.