My heart is breaking for you. I can only imagine what you’re going through. I’d be worried about a bone biopsy too. Will that be definitive? Can they aspirate the tumor instead? Or check bloodwork? I’d ask if there were less invasive options.
It may be a benign tumor, that’s hampering his walk. Unless it’s spread to the bone, it’s not near organs. So he will be ok for along time. Let’s 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 it’s nothing.
Take care of yourself, Darick needs his mom. I will be praying really hard for you both.