Sebastian Guerra was an otherwise typical 10-year-old who faced an extraordinary battle with bravery. He was diagnosed with diffuse midline glioma, an inoperable brain tumor, and was given a grim prognosis.

“They looked at me and they said, ‘I’m so sorry your son has this type of tumor... and it’s very aggressive,'” Kathryn Mosier, Sebastian’s mother, told KTLA. Doctors said Sebastian would be lucky to make it to his 11th birthday. His only hope came from a clinical cancer trial, which he was approved to join, and the early results were encouraging.

Mosier said her son was nearly symptom-free for more than 10 months.

Dr. Ashley Plant-Fox, who spent eight years developing the trial, explained how the treatment works. “It’s basically targeting 16 unique neoantigens or markers on the tumor

See Full Page