John Tesh is opening up about his fight against cancer, a decade after doctors told him he might only have 18 months to live.

Tesh credits science, his wife, and his faith for still being alive.

Former ET co-host John Tesh revealed he that he far exceeded the wildest expectations of doctors who diagnosed him with cancer more than a decade ago - but he still lives with the disease.

John Tesh reveals he was given 18 months to live after a rare metastatic prostate cancer diagnosis. Here are the details.