© 2005-2012 American Society of Clinical Oncology (ASCO). All rights reserved worldwide.
Because the results of HER2 testing make a difference in a patient's treatment and outcome, it is important that HER2 testing produces accurate results. This guideline was developed to enhance the accuracy of HER2 testing for patients with breast cancer. Use this guideline to talk with your doctor about the accuracy of your test results for HER2 in the laboratory that he or she uses.