NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,643 terms related to cancer and medicine.

We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.

A drug used to treat HER2 positive (HER2+) breast cancer that is advanced or has spread to other parts of the body. It is used with capecitabine in patients whose cancer has not gotten better with other anticancer drugs. It is used with letrozole in postmenopausal women whose cancer is hormone receptor positive (HR+) and who need hormone therapy. It is also being studied in the treatment of other types of cancer. GW572016 blocks epidermal growth factor receptor (EGFR) and other proteins, which may help keep cancer cells from growing. It is a type of ErbB2 and EGFR dual tyrosine kinase inhibitor. Also called lapatinib ditosylate and Tykerb.