Still have some research to do but the results are back and he had a spindle cell tumor that was removed from his chest that most likely will grow back at some point and require surgery again. Vet can't really predict how soon it will grow back.
The mass on spine was benign and no cause for concern. We meet with them next week to discuss further treatment plans and have sutures removed. Rock is oblivious and just wants to get back into his usual routine of being spoiled with daily outings and such so that is what he will get.
He has healed great from his surgery. Thanks again for all the good thoughts for our boy. He is so special to us!