I had lower back pain and numbness in my left leg. My recent MRI report says 1) Diffuse posterior bulge with posterocentral focal protrusion of L3-L4 disc causing significant thecal and cauda equina compression. Inferior nerve root canal are moderately narrowed. 2) Sacralisation of L5. The effective midsagittal diameter of spine canal at various disc levels are as follows - D12-L1 16mms, L1-L2 16mms, L2-L3 15mms, L3-L4 5.8mms, L4-L5 12mms. Right now I am feeling well, no pain or numbness on my lower back or left leg. Please tell me how serious this condition is. I don t want to go for any surgery. What should I do?