In early 2009, Hilary McQuiston-Fall was enjoying an active lifestyle full of outdoor activities in San Francisco, California. But when the 26-year-old fell while snowboarding, she realized something wasn’t right.

Doctors initially treated her for a broken tailbone, but months later, she was still dealing with pain and swelling. After a battery of tests, Hilary was diagnosed with chondrosarcoma in her right hip. Over the next six...