Fifteen-year-old Keley Roller was enjoying a trip to the beach in Destin, Fla., in July when she received a diagnosis that changed her life. Doctors told Keley she had chronic myeloid leukemia, an uncommon type of cancer of the blood cells.“We were sitting on the beach when she started to feel really bad,” said Keley’s mother, Yvonnda. “The next day, she could hardly get out of bed so I took her to the emergency room.