Trastuzumab (Herceptin) is specifically indicated for patients with breast cancer that overexpresses which receptor?
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Correct answer: HER2/neu (ErbB2)
Trastuzumab targets the Human Epidermal Growth Factor Receptor 2 (HER2). Blocking this receptor inhibits the proliferation of tumor cells that are 'addicted' to HER2 signaling for growth and survival.
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