7-year-old fighting multiple health conditions brings smiles to millions on TikTok • 7 min read 7-year-old battling three rare conditions still finds ways to smile Isabella Thompson, 7, is fighting hirschsprung’s disease, severe combined immunodeficiency (SCID) and was born with a form of dwarfism.ABCNews.com A girl who's been hospitalized for most of her life is inspiring millions with her contagious spirit. Isabella Thompson, 7, was born with hirschsprung's disease, severe combined immunodeficiency and a form of dwarfism. Bella has had 21 surgeries, including a bone marrow transplant, and is on the wait list for a bowel transplant. "She's definitely shown me that she's very resilient all on her own," Bella's mom, Kyla Thompson, of Swift Current, Canada, told "Good Morning America."