Severe lower back pain for 18 months with a leave of absence from work is significant and i am glad you underwent a workup. Do you have any buttocks or leg pain or is the pain squarely located in your lower back?
I am unclear as to the results of your discogram. DIscograms are rated by pain, pressure and morphology (the appearance of the disc on the X-ray and the post-discogram CT scan). The discs are named for the vertebra they are sandwiched in-between. For example the L3-4 disc is the disc in-between the L3 vertebra and the L4 vertebra.
Discogram pain is rated on two different parameters; type of pain and intensity of pain. If you report the same pain during the pressure run up as you normally experience, this is called concordant pain (also known as P2). Pain that is not familiar with pressure run up is called discordant pain (also known as P1). The intensity of pain is rated by a 0-10 visual analog scale (VAS).
Pressure is recorded during the run-up and noted as opening pressure (the pressure needed to start the dye flowing into the disc) and the maximum pressure obtained.
Finally, the disc internal architecture is noted. Is there a full tear in the disc wall with dye flowing into the epidural space, minimum discal disruption or a normal disc appearance?
See if you can get a copy of the discogram report and note these parameters on the forum.
Dr. Corenman
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.