A substance being studied in the imaging of breast cancer and some other types of cancer. It is made by attaching a radioactive substance called indium In 111 to the monoclonal antibody trastuzumab. Trastuzumab binds to the human growth factor receptor 2 (HER2/neu) on some breast cancer cells and on several other types of cancer cells. Indium In 111-CHX-A DTPA trastuzumab is a type of radioimmunoconjugate.
Source: NCI Dictionary of Cancer Terms
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