I don't know...you'd have to talk to your surgeon about this. Hematomas are collections of blood outside the blood vessels that can form into hard masses. This suggests, to me, a layman, that they could impinge on the spinal column but this is just a guess and your doctor would be the one to ask.
Whatever the answer I hope you recover quickly from that surgery...
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.