My son plays quarterback and two weeks ago he got tackled limped off to the sideline and had the trainer look at his knee. He said it had already stopped hurting, and the trainer looked at it said he thought it was just a minor meniscus tear if anything. He did recommend he go to the Saturday sports clinic. He did and they ordered an MRI. The doctor just called back and said he doesn't need to be walking he has a Partial Lateral knee fracture. They are considering putting him in a groin to toe cast, and he is devastated. My question is how could he have been pain free,running around, jumping on trampolines, and running if there truly was something so seriously wrong with his knee??