Breast Cancers Can Change Biologically as They Progress and Relapse
In many women with recurrent breast cancer, the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) status of their tumors changes between treatment for the primary tumor and relapse, a large retros..
Original Article: Breast Cancers Can Change Biologically as They Progress and Relapse
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