Q Signal abnormality and mild expansion of L2 vertebra- A There is some abnormality in L2 vertebral body causing abnormal appearance of marrow, the vertebral body is also expanding because of this.- The exact signal changes mentioned in report are important to further comment on this. Q L2-3 broad disc protrusion with thecal sac effacement, central canal and lateral recess stenosis L3-4 central and left disc protrusion effacing the thecal sac and contributing to the left lateral recess stenosis. Mild effacement of the left L4 root withing the left lateral recess. Segmentation abnormality. Can you tell me what this says in plain english? A There are intervertebral discs to support the vertebral bodies. when there is abnormal stress on discs the disc material come out on back side where there are nerve fibres in fluid containing recesses this disc material presses it and there is resultant pain / muscle spasm / loss of function depending upon severity. With the information provided in your case i believe there is maximum problem at L4 root level.