Hi,
Your dad will be offered the same treatment regardless of where in the body the cancer has spread (as far as I am aware). My father also had a hotspot in his spine on diagnosis.
Hopefully, your dad's team will make him aware but you should get familiar with the symptoms of spinal cord compression, or SCC (as others have mentioned). It is a rare, but possible, result of tumours in the spine. We were not made aware and my father was diagnosed too late - the consequences have been life changing.
Good luck to your dad with his treatment,
K x x