Just seen my doc. yesterday. Had a Myelogram on mar 2. He says that one of the nerve root sleeves hase some kind of blockage. He was going to see about a saline injection to see if they could open up the sleeve. Anyone heard of this? Ruptured L5-S1 some twenty years ago, bad sciatica in left leg. Could this be a scar from that rupture? Thanks alot.