Moon was ten years old when she noticed a lump on her left tibia that looked like a small ball. She lived with it for nine months because no one could determine what it was. At one point, doctors planned for an amputation, but during her hospitalization, her parents found an orthopedic specialist in another part of Italy who was able to save her leg, twice.
She experienced localized recurrences and underwent multiple surgeries, along with radiation and chemotherapy for one year. During treatment with vincristine and other medications she does not recall, she was extremely ill, sleeping constantly, vomiting, and struggling to swallow. She was hospitalized several times for high fevers and required blood transfusions.
Moon never developed metastases, but later developed ulcerative colitis at age eighteen, a condition she continues to manage. While doctors say it is not connected to her cancer history, she does not fully exclude the possibility. Today, she describes her life as full. She is a violinist, yoga teacher, and loves surfing.