A new American Cancer Society report reveals that rectal cancer now accounts for one-third of all colon cancer cases, with diagnoses surging among people in their 40s, 50s, and 60s. The rate of rectal cancers in people under 50 doubled between 1998 and 2022, suggesting an environmental trigger rather than lifestyle factors is driving the trend.

Scientists suspect dietary changes since 1950 may be responsible, as every generation since the Baby Boomers faces increased risk. The data shows colon cancer rates rising 3% annually in people under 50, while decreasing 2.5% yearly in those over 65. Nearly half of all colon cancer diagnoses now occur in people under 65.

Experts emphasize that bloody stool, severe abdominal cramping, and changes in bathroom habits warrant immediate medical attention. At-home fecal immunochemical tests offer a convenient screening option, with studies showing high sensitivity for detecting rectal tumors. Everyone over 45 should undergo regular screening, as early detection through colonoscopies can prevent cancer by removing precancerous growths.