personalized_medicine_01_txt

More recently it has been shown that it is possible to distinguish between metastatic breast cancer and non-metastatic breast cancer by comparing the levels of expression of only seventy or so genes.  Metastatic breast cancer spreads more rapidly, has a much worse prognosis and requires much more aggressive treatment than does non-metastatic breast cancer, which tends to spread much less. The ability to distinguish them provides valuable information that can be used to tailor treatment to that particular tumor type.