New guideline takes on tough HER2 cases
October 2013—In HER2 testing for breast cancer, the term “equivocal” verges on being a four-letter word. If the patient has a clearly positive test result, therapies targeting HER2 become a treatment option, and a highly successful one at that. If the result is clearly negative, HER2-targeting drugs are off the table; the patient isn’t expected to benefit from the drugs, which are expensive and can be cardio-
toxic.