In April 2012, Nicole Pierson noticed something odd about how her 5-year-old son, Gavin, was viewing objects. A medical evaluation concluded that Gavin was suffering from a brain tumor the size of a peach. Gavin endured nearly half a dozen craniotomies, bouts of chemotherapy and drugs to battle a tumor he named "Joe Bully." Today the tumor remains but is currently under control. Nicole shares how nearly losing her son and an uncertain future affects her and her family.