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By Christin Melton

Articles by By Christin Melton

The American Society of Clinical Oncology (ASCO)and the College of American Pathologists (CAP) jointly released guidelines designed to improve the accuracy and usefulness of immunohistochemical (IHC) testing for estrogen receptor (ER) and progesterone receptor (PgR) status in breast cancer tumors after convening a panel of international experts to study the issue.