What does this mean? "L1-L2 level: left paracentral disc protrusion, contacts the traversing left L2 nerve root mild posterior displacement"?

It is telling you- -that you have a disk protruding out from the disk space, & it is taking up the normal space that your L-2 nerve root needs to be happy. Also say the disk is pushing the L-2 root & pushing it back against the boney canal it is surrounded by. Now this is important if you have leg pain that matches theMRI reading. Some are asymptomatic so see a fellowship trained spine surgeon my preference=isortho.