First on CNN: Routine blood testing may hold hidden clues to colorectal cancer before age 45

When you have your blood drawn in a routine doctor’s visit, some of the markers in your blood that get tested could hold unexpected clues to how likely you are to develop colorectal cancer at a young age, new research suggests.

​ When you have your blood drawn in a routine doctor’s visit, some of the markers in your blood that get tested could hold unexpected clues to how likely you are to develop colorectal cancer at a young age, new research suggests. Read More Breaking News, Latest News and Videos | CNN