DESCRIPTION   At age four, Hope Nightingale complained of severe pain in her legs.  At first, her parents thought she was just being a hypochondriac.  That changed when she fell off her scooter and broke the distal femur in her left leg.  The following year, 2011, this led to a diagnosis of Stage II osteosarcoma, a type of bone cancer.  After a regimen of neoadjuvant chemotherapy featuring cisplatin and doxorubicin, Hope underwent a surgical procedure, a vascularized fibula t