It may be a benign tumor, thatís hampering his walk. Unless itís spread to the bone, itís not near organs. So he will be ok for along time. Letís think of the positive possibilities.
Darick sure looks healthy, you care for him so well. You are not going to lose him for a while. And maybe not at all if itís nothing.
Take care of yourself, Darick needs his mom. I will be praying really hard for you both.