Colorectal Cancer Is Now the Top Cancer Killer of Americans Under 50: What an Oncologist Wants Younger Adults to Know

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For decades, colorectal cancer was considered a disease of older adults. That picture has changed. Colorectal cancer is now the leading cause of cancer death in Americans younger than 50 and the second leading cause of cancer death overall, according to the American Cancer Society's Colorectal Cancer Statistics, 2026 report.

Oncologists increasingly treat patients in their 30s and 40s who never imagined this diagnosis was possible for them. Many had symptoms for months that they, or their doctors, attributed to something minor. That delay is one of the few parts of this trend we can actually change.