LEAD FROM BEHIND: Colorectal Cancer Awareness Posted on March 31, 2025March 31, 2025 by WebmasterHIIRS 1 in 3 people who should get checked for colon cancer don’t. Colon cancer screening should begin at age 45 unless you have family history or symptoms, in which case it should be done earlier. Visit LeadFromBehind.org to know your choices.