music, sports, family, the things most important to zach sobiac. >> zach loved sports.ng age. he tried all different kinds of sports. football, basketball. >> in august of 2009, 14-year-old zach sobiac went for a run that stopped him in his tracks. >> when came back, he said mom, my hip hurts. i took him to the doctor. we had an x-ray done. >> you would initially think that is a muscular thing much we went to physical therapy for two months. it got worst. >> two months? >> yeah. it got worse. it got to the point where he couldn't bend over and tie his shoes anymore. the physical therapist said this isn't working. you need an mri. >> that's when doctors discovered a tumor. his pain was caused by a rare form of bone cancer. >> only approximately 500 young adults are diagnosed every year in the united states. >> despite the shattering diagnosis and sickening rounds of chemotherapy, zach remained focused and hopeful. >> he was determined that he was still going to do the things he wanted to do despite his cancer. >> we had a lot of hope. there were a lot of treatments that