After the surgery, Chapman’s physicians recommended radiation therapy as a next step to destroy any remaining tumor cells. Because the area of his tumor is sensitive and is involved in many important cognitive functions, his physicians agreed that proton therapy was the only option.
Chondrosarcomas are “hard to kill,” as James puts it, and proton therapy would be able to target the remaining tumor with a higher dose of radiation and minimize radiation to surrounding areas, especially the brainstem and the nerves allowing for vision.
Chapman, Mochi, and his aunt, Debbie, made the trip to Seattle for proton therapy. At Fred Hutchinson Cancer Center – Proton Therapy, he met Lia Halasz, MD, who would be his radiation oncologist, and whom he really liked.
“Proton therapy for skull-based tumors such as chondrosarcoma is an important tool in allowing a high dose of radiation to the tumor while keeping the risk of vision loss and new neurological symptoms low enough,” said Halasz. “However, it does take 7 to 9 weeks of daily treatment, which can be hard on patients who have to be away from home for that long.”
“Everyone was so nice and very accepting,” said Chapman. “They put my preferred name above my legal name on my badge and they would check in with me to see how I was doing. It felt like everyone was a big family there and did their best to make me feel at home. They even gave me a birthday card when I turned 25.”
Chapman received protons from four angles each day, and during some angles he would experience a flicker of light in his right eye. He also experienced some other effects while the proton beam was on that sometimes happen to patients who receive radiation to the skull-base and brain. These included a sensation of warm sunlight on his head as well as a smell of chlorine.
Side effects from the treatment included nausea, lack of appetite and constipation, which led to his discovery of a severe and rare laxative allergy. Nausea medication can cause constipation, for which a laxative is frequently prescribed. For Chapman, it resulted in extreme stomach pain. He also found he was dealing with a lot of fatigue but learned that staying hydrated and active really helped.
“My aunt and I would walk every day. I used the Pokémon Go app to help me meet my walking goals as well as serve as a fun distraction,” said Chapman. “We explored downtown, the zoo and aquarium and visited the Ballard Farmers Market. On Tuesdays, we went to the movies, and at the end of my treatment we visited MoPop and the Space Needle. I am a bit scared of heights, but I was able to lay on the glass floor, have fun and take photos.”