Football practice was leaving a teen fatigued. A rare cancer was to blame.

Cameron Rider had always been an athlete and loved hockey and baseball. The summer before his junior year of high school, he decided to join the football team. Pre-season practices in August left him fatigued and out of breath, but Rider, 16 at the time, just thought he was getting used to the new sport. As the weeks passed, his symptoms escalated. When his tiredness turned into a 105 degree fever and body aches, his parents took him to a local emergency room. He was diagnosed with pneumonia. …