Healthy Women May Have Cells That Resemble Breast Cancer

A study published in the November 2024 issue of Nature found that in healthy women some breast cells that otherwise appear normal may contain chromosome abnormalities typically associated with invasive breast cancer. The researchers examined samples from 49 healthy women without known disease who were undergoing breast reduction surgery and discovered that at least 3 percent of normal cells from breast tissue in the study participants contained a gain or loss of chromosomes, a condition known as aneuploidy, and that they expand and accumulate with age. The study builds upon previous findings from the Human Breast Cell Atlas, which profiled over 714,000 cells to generate a comprehensive genetic map of normal breast tissue at the cellular level. The new study challenges conventional thinking about the genetic origins of breast cancer, which could influence early cancer detection methods in the future.

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