Breast cancer research and treatment have long focused on a patient's original tumor as a guide to preventing relapse; however, research suggests that some recurrent cancers are different from the primary tumor and may respond better to different therapies. (pennmedicine.org)
But genetic similarities between metastasized and original tumors suggest that multiple cells move together to remote sites. (sciencenews.org)
Metastasis is tһe process wһегеby cancer cells spread frоm thе site оf thе original tumor tо onе oг mогe otһеr places іn tһe body. (altichealthprevention.com)