X-ray results showed- advanced L5-S1 degenerative disc disease, moderate facet in lower lumbar spine, L5-S1 4mm retrolistnesis and moderate sclerosis?

Worn down. L5-S1 is the lowest motion segment in the spine. The MRI shows that level has become "worn down" leading to degeneration of the disc and the facet joints, sclerosis, and a slight slippage (retro listless) of one vertebrae on the other. Don't hesitate to be seen. Many good treatment options available.