hi i am 60yrs old and suffering from pain and heaviness of my left leg,iwas advised mri and mri impression are mild grade retolisthesis of L5-S1,lt.paracentral protrusion ofL4-L5 disc causing mild identation the thecal sac without neurological compromise,paracentral extrusion ofL5-S1disc with caudal migration behind si veterbralbody effaces anterior epidural fat &severe compression of the lt..nerve roots. is surgery a remedy......