Normal central canal and facet joints (image #255).,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. 
Normal central canal and facet joints ( image # 255).,L4 - 5 : There is normal disc height , circumferential annular disc bulging , left L5 hemilaminectomy and posterior central / right paramedian broad - based disc protrusion measuring 4 mm ( AP ) contouring the rightward aspect of the thecal sac .