I'm scheduled to see a doctor about this report next week, but I'd like to know what it means beforehand. Here is the info:

FINDINGS:

There is mild retrolisthesis of L4 on L5. There is disc desiccation, height loss, and an annular fissure at L4-L5.

L1-L4: Everything is normal except that there is mild bilateral facet arthropathy in all of these discs.

L4-L5: There is a disc bulge with superimposed central disc extrusion. There is mild bilateral facet arthropathy. There is no neural foraminal narrowing. There is severe central canal stenosis.

IMPRESSION:
Severe degenerative disc disease at L4-L5 with milder degenerative changes in the remainder of the lumbar spine as described in detail above.

Degenerative disc disease is a pretty broad term, so I'm not exactly sure what's wrong or what I'm looking at in regards to treatment options. Any sort of help on any of these terms would be highly appreciated.