Reality TV star Ethan Zohn is battling cancer again.
 
The "Survivor" star was in remission from Hodgkin's lymphoma when doctors told him the cancer had returned in his chest.
 
He tells People.com, "It's localised in my lung area, but it's good that it's not all over my body."
 
Zohn has completed 12 weeks of pioneering chemotherapy treatment and is intent on completing the New York Marathon on Sunday.