Leg pain and hand numbness

MRI shows Sciatica root nerve still abutting left S1 foriminal op[ening. Dengerative disc disease with all thoracic & disc bulges, severe numbness in left hand, CT showed bilateral narrowing C3-4, also had surgery on L3-4, L4-5, and S1. What's causing the numbness to my hands?  I also have alot pain and horrific full leg spasams into left foot.

[Nassim Abi Chahine, MD]

The neck calcifications are the cause of your hand numbness, but for now you should focus on a treatment for your sciatic pain.. do a surgery for the degenerated disc, first you  will prevent a permanent lower limb WEAKNESS and you can improve your quality of life, keep your back muscle strong and thats how you prevent a subsequent Listhesis (a type of vertebral joint dislocation)
Dr Nassim

[auntiechrissy]

Since the L5 disc was so calicifed at time of surgery. And its still widely protruding the surgeon didn't do much.  Whart is Listhesis?

[Nassim Abi Chahine, MD]

Listhesis is a sliding dislocation of one vertebra over its neighbour one and that is facilitated by the degeneration of the disc.