Cancer could have easily taken over the Ferguson family by now.

Three of the family members – wife/mom Sandy and daughters Alyssa and Jenna – have Li-Fraumeni syndrome. This rare genetic condition puts them at high risk to develop multiple types of cancer throughout their lives. Sandy is a two-time breast cancer survivor, and Alyssa, 14, is currently undergoing treatment for medulloblastoma, a form of brain cancer. Jenna,...