Breast cancer cells spread in an already-armed mob
Most tumor-driving mutations are carried from original malignancy, study suggests
![cluster of tumor cells](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/05/051017_TI_metastatic-breast-cancer_main_FREE.jpg?fit=860%2C460&ssl=1)
ON THE ROAD Breast cancer cells may break away from the main tumor in clumps, already bearing most of the mutations that will drive cancer recurrence, a study suggests. Shown here is a cluster of circulating tumor cells (red) from a patient with breast cancer.
Min Yu/USC Norris Comprehensive Cancer Center, NATIONAL CANCER INSTITUTE