Alex Trebek has recorded a PSA for the World Pancreatic Cancer Coalition. He says, "I wish I had known sooner that the persistent stomach pain I experienced before my diagnosis was a symptom of pancreatic cancer," he says. He also names other pancreatic cancer symptoms, like mid-back pain, unexplained weight loss, new onset diabetes, and yellowing skin or eyes. Alex is asking people to wear purple in November to spread the word about the disease and its symptoms. He revealed he has pancreatic cancer earlier this year.