In November 2016, when I was 9 years old, I was diagnosed with Ewing’s sarcoma. My parents took me to MD Anderson, where I had chemotherapy, surgery and radiation therapy. I also got daily injections for 11 months, to keep me from developing blood clots.

I’m glad that all of those treatments worked, because I haven’t shown any signs of cancer since my surgery in February 2017. I still had to finish my treatments after surgery to...