[HER2-Positive Breast Cancer Brain Metastasis Recurred after Whole-Brain Radiotherapy and Successfully Treated with Trastuzumab Deruxtecan]
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A 50-year-old female patient noticed a mass and pain in her left breast, and needle biopsy revealed mucinous carcinoma that was negative for hormone receptors and positive for HER2/neu. After further examination, she was diagnosed with left breast cancer, cT3N... ...
