I would expect the results of the biopsy to take about a week.
Like Nootch, I also have a nephew, he's 34 now. While in his mid 20s, working nights as a paramedic, he was wading in the Gulf one morning after work, LUCKILY with his fiancé at the time. He suddenly collapsed into the water, and fortunately his fiancé was able to rescue him from drowning. Initially the thought was he passed out from exhaustion. But they did an MRI and in fact he had a brain tumor.
For him, he did have surgery, but his tumor was not "encapsulated", and they were unable to get all of it. And it is cancer. At that point, they have to weigh the options. How much cancerous material can they get without affecting his motor functions, so they didn't get it all. He has undergone chemo and radiation and is actually still working as HEAD paramedic in Pensacola FL. His only side effect is a pronounced limp, but he blames that on a foot injury none of us ever heard about, including my sister...his mother. But point being, there's a ton of examples of otherwise healthy people surviving and thriving through something like this. My prayer is for Greg to survive and thrive, and if it is thriving on the football field, so be it. But I don't care if he's a car salesman. Just praying for survival and thrival in life.