Researchers studied tissue next to head and neck tumors that looked normal under a microscope. DNA sequencing showed these cells rarely shared the tumor's mutations. Instead, the tissue had lost its normal structure: cells matured incorrectly, and some developed tumor-like features.
More than half of head and neck cancers return after treatment. Doctors judge whether surgery removed everything by how nearby tissue looks under a microscope. This study suggests that check can miss danger: tissue can look normal yet already be primed for cancer. Spotting this hidden state could improve how recurrence risk is judged.
✦ Healthy-looking tissue can still be primed for cancer — organization matters as much as mutation.