A recent study published in Cancer revealed that about 15% of adults with colorectal cancer are diagnosed before the age of 50. This is important since the recommended age of screening (and for which insurance will pay) is 50.
These younger patients were significantly more likely to present with regional or distant disease spread but at the same time, they were more likely to receive aggressive treatment and survive longer.
In the future, screening guidelines may change to a lower age. In the meantime, I recommend testing your stool with FIT (Fecal immunochemical testing) or Cologuard (DNA testing), to detect any blood in the stool.