ASCO-CAP guidelines for breast predictive factor testing: an update.

This brief report compares and contrasts the American Society of Clinical Oncology/College of American Pathologists guidelines for breast cancer predictive factor testing including the American Society of Clinical Oncology/College of American Pathologists human epidermal growth factor receptor, type 2, erbB2 Guideline published in 2007 and the recently published Guideline for Estrogen Receptor and Progesterone Receptor Testing by Immunohistochemistry, published in 2011.