Hi Diane,
I am not a doctor but i was told that OPLL occurs mostly in Cervical (C2-C7) or Lumbar(L1-L5) areas. If you see the spine compressed in the T7-T10 area, most likely you have herniated disks in this area. The T7 vertebra is one of the 12 thoracic vertebrae found in the middle region of the back. I don't believe it has any thing to do with OPLL.
If you have pain around the T7-T10 vertebra or anywhere along the spine, you should consider beginning a regimen of non-invasive, conservative treatment, like mild exercise, pain medication, or steroid injections.It is very server situation, then only opt for the surgery.
Again, I am not a doctor but based on my research in the past 3 months, I am offering on what I know.
Good thing you have to do is, know what you have with the doctor. Then you can think of alternatives to fix the problems.
Hope this helps.