Longtime Jeopardy! host Alex Trebek announced that he has been diagnosed with stage 4 pancreatic cancer. Trebek, 78, has hosted the iconic quiz show since it debuted in 1984. He made the announcement in a video to fans on Wednesday. He said that the cancer has a “low survival rate” but that he intends to beat it. In the video, he said the following: “Hi everyone, I have some news to share with all of you and it’s in keeping with my longtime policy of being open and transparent with our Jeopardy!