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A 58‒year‒post‒menoposal woman was presented with left chest pain and shortness of breath because her breast cancer metastasized to the skin, lung, and pleural dissemination. In late‒line treatment for hormone receptor‒positive HER2‒negative advanced/recurrent breast cancer, we experienced a patient with tumor shrinkage leading to pain relief who was treated with a second combination of a CDK4/6 inhibitor and fulvestrant. Due to her poor performance status, she was treated with combined therapy to avoid severe adverse events. The CDK4/6