>> reporter: at 47 years old, sandy krykostas was diagnosed with stage 4 colon cancer that had spread to his liver. >> when you have a wife and two young children and they tell you to get your life in order, that's a scary point. >> doctors gave him two months to live. >> i wasn't supposed to have colon cancer. nobody in my family has colon cancer. >> reporter: with no family history and symptoms that started weeks before, cases are on the rise. those under 50 has shot up 51% since 1994 while at the same time rates steadily declined in people over 55 because of screenings. in response, the organization has issued new guidelines recommending people start screening at 45 instead of 50. >> if we can identify patients with early onset colon cancer earlier, we have a better chance

captioning funded by cbs captioning funded by cbs >>> it's thursday, may 31st, 2018. this is the "cbs morning news." >>> it's the meeting to save the summit with president trump and kim jong-un, secretary of state mike pompeo holds talks with the top north korean official here. >>> deadly deluge. north carolina gets pounded by remnants of subtropical storm alberto. >>> and things are heating up in hawaii. lava now spreading quickly, and for some, the last escape route could be cut off. >>> and good morning from the studio 57 newsroom at cbs news headquarters in new york. good to have you with us. i'm brook silva-braga in for anne-marie green. >>> here in new york secretary of state mike pompeo and a top north korean diplomat plan to hold what's described as dau