Intervertebral Disc Disease (IVDD) intervertebral disc disease Intervertebral Disc Herniation Intervertebral Disc Disease Intervertebral Disc Disease Intervertebral Disc Disease (IVDD) intervertebral disc disease Intervertebral disc disease Intervertebral Disc Disease (IVDD) Intervertebral Disc Disease Intervertebral disc disease Ventral Slot Decompression Hemilaminectomy