Former `Survivor' Contestant Succumbs to Breast Cancer at 37
Lyon was diagnosed with breast cancer in 2005, the same year she finished fourth on the CBS reality show.
A network representative confirmed her death Wednesday.
Lyon was raised in the Columbia River city of The Dalles. Her biography on CBS.com says she attended Portland State and Western Oregon universities before graduating from Oregon State.
She joined the "Survivor Palau" competition as a nanny and graduate student from California. Following her diagnosis, she became an advocate for breast cancer awareness.