<s>[INST] What does diffuse disc bulge at the L3-L4 level with minimal thecal sac compression mean? Also according to my MRI I have minimal central canal stenosis at the L4-L5 level secondary to disc bulge Ligamentous and facet hypertrophy. What does this mean? I have severe pain in my left hip radiating down my thigh and across my back/hip. [/INST] Hello,Between vertebrae cartilaginous circular discs are there. If the degenerate and bulge and compress the spine in front of them. So in your case lumbar vertebrae 3rd and 4th inter disc is bulging and lead to nerve compression.That's why your suffering from pain radiating to your leg. Physical therapy and pain killer medication may useful. If symptoms not improved please consult with your orthopedist / neurosurgeon he will examine and treat you accordingly.Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Penchila Prasad Kandikattu, Internal Medicine Specialist </s>