03/01/2026
Seven-year-old Chandler Hammond was diagnosed with what his doctor called an exceptionally rare genetic disorder named Hao-Fountain syndrome.
His mom, Courtneay Dellavalle-Jones, said she noticed significant delays in her son's ability to walk and talk, and pushed for genetic testing. That testing confirmed the Hao-Fountain syndrome.
"The gene for Hao Fountain syndrome is this gene, USP7, and that gene is so sensitive one letter out of thousands can change the function enough, and really steer a child's developing brain into autism and difficult behaviors in a way that, even though everything else is optimized, that's all it takes," Dr. Theodore Wilson, medical geneticist, said.
Chandler is the only patient in Indiana with this diagnosis, and one of very few people with Hao-Fountain syndrome around the world.
Seven-year-old Chandler Hammond was diagnosed with what his doctor called an exceptionally rare genetic disorder named Hao-Fountain syndrome. His mom,…