My 6 year old granddaughter Olivia was diagnosed with Medullablastoma in March. Through multiple surgeries and all the poking and prodding that goes into extended hospital stays, she has remained the most optimistic person I know. She always has a smile on her face. She is my hero. She still has quite a battle ahead but she handles it all with grace. Even the bad days. I walk for her. #optimisticforolivia