Alex Trebek Thanks Fans for br Support After Cancer Diagnosis Trebek was recently diagnosed br with stage 4 pancreatic cancer. The long-time 'Jeopardy!' br host has received an br outpouring of support br from fans. He took the time to post br a video, thanking everyone br for their well wishes. Alex Trebek, via Twitter Alex Trebek, via Twitter The 78-year-old seems to be in br good spirits, as he made light of br the diagnosis last week.