What are the adverse reactions to laminectomy?

Depends...: Laminectomy involves removal of the bony covering of the spinal cord and the spinal nerves. Potential risks of surgery include a tear in the spinal sac which can cause a spinal fluid leak, infection, bleeding, instability over time which may require a fusion surgery in the future, more back pain, and injuries to nerves.

Sometimes there can : Develop instability of the spine from removing bone in already unstable situation or one is created by removing too much bone. Scar tissue will develop & this can lead to nerve symptoms developing weeks after the surgery but most do resolve over time. Then there are complications related to surgery like: infection, nerve injury, dural tear, blood losses, anesthesia complications, to name a few.

Yes: You should speak with your surgeon if you are having this, but in general, you can have nerve damage, bleeding and infection, as well as scarring around the area that can later lead to more pain. That being said, it is a very safe an often productive procedure with experienced neuro or ortho spine surgeons.