"Get a colonoscopy when you turn 50. It's really important." Diane Bowlin speaks from experience. Her first colonoscopy saved her life. The diagnosis of an early cancerous polyp was completely unexpected. And for Diane, who has made a lifelong practice of keeping fit and eating healthy, it seemed so unfair. "I felt like I did the right things, and for a little while after I was diagnosed I said, "Why me?" Why has this happened to me. But then I realized that one, that question wasn't going to be answered. And two, it wasn't going to get me anywhere," said Bowlin. Colorectal cancer is the third most common cancer in women. "It's kind of that cancer that people don't want to talk about," she said. It's dangerous because it's silent. The number one risk factor for colon cancer is the presence of polyps or small outgrowths within the wall of the large intestine and there's usually a five-year period between the development of a polyp and its possible transformation into a cancer. But if it's caught early, as it was in Diane's case, the chances of a cure are good.