The worst part of Joshua’s treatment was over, but he still had a course of radiation to go before the family would learn whether his cancer had been driven into remission. On Sept. 24, he sat on a hospital bed at the University of Colorado Anschutz Medical Campus oncology center, in Aurora, waiting for it to begin. A month out from the end of chemo, his skull was shadowed with new hair, and his eyebrows and lashes had started to grow back.“He’s my little peach,” says Joseph, scrubbing his son’s head playfully. The radiation is intended as a second line of attack against any cancer tissue that remains. If the disease can be forced into remission, and stays that way for more than a few years, odds are it won’t recur, says Joshua’s radiation oncologist, Dr. Brian Kavanagh.