KEILAR: There are new guidelines this morning from the American Cancer Society. They're lowering the recommended age for colon cancer screening to 45. It was previously 50. And the move is coming in response to rising colon cancer rates and deaths in young adults. CNN senior medical correspondent Elizabeth Cohen here with us now to break it all down. This is a significant move, dipping this age for screening by five years.</s>ELIZABETH COHEN, CNN SENIOR MEDICAL CORRESPONDENT: It certainly is, Brianna. I think people got 50 in their head, that's when I need to start having colonoscopies but now the American Cancer Society is saying really everyone ought to start at 45 and there is a really simple reason. They started noticing that rates of colon cancer were going way up among people under 50. 51 percent higher over the past 25 years. That's a big increase. So the American Cancer Society said, you know what, let's start getting colonoscopies or other types of screenings at age 45 instead of 50. Now, Brianna, some people might be thinking, wait a second, my doctor already told me to start at 45. Some people for years now have been told to start at 45. They are especially at high risk because they're African-American, they have a family history, so some people have already been doing 45 for some time now -- Brianna.</s>KEILAR: And does the screening work pretty well, Elizabeth?</s>COHEN: It does work. So when you look at people over the age of 50, so the group that has been screened their colon cancer rates have gone down by about a third over the past couple of decades. That's a huge decrease so that's another reason for this new rule. They're saying, hey look, this worked in people over on 50, let's try it in people under 50.</s>KEILAR: All right. Elizabeth Cohen, thank you so much for that. Still ahead, Serena's statement. The tennis star returning to the French Open and in smashing fashion. The "Bleacher Report" is next.
New Guidelines Get Colon Checked at 45, Not 50.