Researchers at MIT and Dana-Farber Cancer Institute have developed a new way to determine whether individual patients will respond to a specific cancer drug or not. This kind of test could help doctors to choose alternative therapies for patients who don’t respond to the therapies normally used to treat their cancer. The new technique, which involves removing tumor cells from patients, treating the cells with a drug, and then measuring changes in the cells’ mass, could be applied to a wide variety of cancers and drug treatments, says Scott Manalis,…