Mri says mild desiccation, slight loss disc height at l5s1, broad based central left sided disc protusion which abuts s1 nerve roots l5.please explain?

Surgery?: Need consult ortho .Conservative treatment might work? If there is no neurological problems.(bladder, bowel, numbness legs, etc.

You have an L5-S1: Level disc that pushes backwards and gets close to the s1 and L5 nerve roots on the left. Whether this finding is important depends on whether your symptoms and physical findings agree with the mri. This is where your doctor comes in.

DDD: Mild degenerative disc disease, without evidence of overt nerve root impingement..There does not appear to be any pathology that entraps a nerve or warrants surgery, according to the info you have provided. See your doctor for full explanation and treatment plan.

Where the: Nerve roots that are going down your leg where there is a protrusion are getting pressure and that is probably where the piano is from. Surgery probably won't help but steroid injections into the area of pressure might. If that fails surgery might be a last resort depending on how bad the disc protrusion is. I have seen them take out the disc if all conservative management has failed.