ACS Releases Checklist as Colorectal Cancer Becomes Top Killer
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- Colorectal cancer is now the leading cause of cancer death among Americans under 50, with about 1 in 5 cases now occurring in people younger than 54 — up from roughly 1 in 10 (11%) three decades ago, according to the American Cancer Society.
- The American College of Surgeons has released free public education materials and a pre-appointment checklist designed to help patients raise concerns about bowel symptoms with their primary care providers.
- Rectal bleeding was the strongest predictor of a colorectal cancer diagnosis in patients under 50, raising the odds by 8.5 times in research presented at the ACS Clinical Congress 2025, per the source.
- Warning signs the ACS checklist highlights include persistent bowel changes, recurring rectal bleeding, dark or narrow stools, unexplained weight loss, persistent fatigue, and reduced appetite.
- The U.S. Preventive Services Task Force recommends average-risk adults begin screening at age 45, though those with a family history of colorectal cancer or inflammatory bowel conditions such as Crohn's disease or ulcerative colitis may need to start sooner.
- Colonoscopy remains the screening gold standard because it allows doctors to identify cancer and remove precancerous polyps during the same procedure, according to the ACS.
- Approximately 1 in 25 men and women will develop colorectal cancer during their lifetime, the source notes, emphasizing that diagnoses still occur more frequently in older adults even as younger-adult cases climb.
Why it matters: Roughly 20% of colorectal cancer cases now strike adults under 54 — double the share from 30 years ago — yet younger patients' symptoms are routinely dismissed as hemorrhoids or constipation, according to ACS surgeon Marylise Boutros. The new checklist gives patients a concrete tool to force that conversation before symptoms advance past early, more treatable stages.
