Alex Trebek Says <br />Some of His Tumors <br />Are Shrinking The 'Jeopardy!' host has been responding well <br />to chemotherapy after being diagnosed with <br />stage 4 pancreatic cancer back in March. Trebek told 'People' that <br />some of his tumors have <br />already shrunk by 50 percent. Alex Trebek, <br />to 'People' The 78-year-old Daytime Emmy <br />winner credits more than just medical <br />treatment for his promising results. Alex Trebek, <br />to 'People' Alex Trebek, <br />to 'People' According to the American Cancer Society, <br />the five-year survival rate for <br />pancreatic cancer patients is 9 percent.