L4-5: There is normal disc height, circumferential annular disc bulging, left L5 hemilaminectomy and posterior central/right paramedian broad-based disc protrusion measuring 4mm (AP) contouring the rightward aspect of the thecal sac. Orthopedic hardware is noted posteriorly at the L5 level. Normal central canal, facet joints and intervertebral neural foramina (image #58).