Good and Bad News About Breast Cancer

“Breast cancer is not one disease, but 10 different diseases … Our results will pave the way for doctors in the future to diagnose the type of breast cancer a woman has, the types of drugs that will work and those that won’t, in a much more precise way than is currently possible.”
 — A new study in Nature that’s explained (without a paywall) by the BBC will apparently provide “a completely new way of looking at breast cancer.”