Scientists find breast cancer cells hiding behind protective “shields”https://www.sciencedaily.com/releases/2026/09/260904000326.htm
Researchers have mapped breast tumors in striking detail and uncovered hidden pockets of dormant cancer cells that may help explain why cancer can return after treatment. Unlike rapidly dividing cells, these quiet cells can essentially hibernate, allowing them to evade chemotherapy and reactivate later. The team found that they are often surrounded by immune cells and connective tissue cells that may act like a protective shield.