Ethan Zohn Diagnosed with Cancer

During Survivor: Africa, Ethan Zohn outwitted, outplayed and outlasted the competition.

Now, the reality TV champion has an even bigger fight on his hands:

Last week, Zohn was disagnosed with a rare form cancer called CD20-positive Hodgkin's Lymphoma; he began chemotherapy on Friday.

"This is the ultimate game of Survivor," Ethan told People, "and there's really only one outcome, and that's to win. There's no other option."

The survival rate for those suffering from regular Hodgkin's disease is around 90 percent.

For years, Zohn has been dating Survivor: The Amazon winner Jenna Morasca. She vows to remain by his side throughout this ordeal.

"I will fight with every fabric of my being to get him through this," Morasca said.