Just being curious, but, if he had brain surgery, wouldn’t there be a scar or something? How fast does his hair grow?
My theory is that he knew he was going to be wearing a boot so “they” used a brain tumor excuse to get him out of the public view.
He didn't have brain surgery because his glioblastoma tumor isn't operable and he underwent chemotherapy and radiation. He did have surgery to remove a blood clot over his eye which is how the brain tumor was discovered and there are pictures of that.