Researchers at Dana-Farber Cancer Institute, Mass General Brigham, and the Broad Institute have uncovered biological clues to why colorectal cancer behaves more aggressively in younger people. Published in Nature Medicine, the study is the largest of its kind and reveals age-associated differences in tumor composition and gene activity. In the U.S., colorectal cancer diagnosis rates among people under 50 rose 2.9% annually from 2013 to 2022, and it is now the leading cause of cancer death in this age group.
Younger patients are also more likely to be diagnosed at advanced stages. The team analyzed 189 tumors from patients aged 29 to 90+, including 54 diagnosed before age 50. Using single-nucleus RNA sequencing, they examined over 850,000 cells, revealing that younger patients’ tumors had a higher proportion of connective and supportive cells.
This approach, which analyzed age as a continuous variable, uncovered subtle differences missed by simple group comparisons. The findings provide a roadmap for future research into prevention, diagnosis, and treatment tailored to young-onset colorectal cancer patients.
Source: Hacker News · Summarized by HeadlinesBriefing