In metastatic breast cancer, prior treatment with CDK4/6 inhibitors predicts high tumor ER-independence, rendering ER-targeting therapies ineffective. However, one patient in the ARV-471 trial had a confirmed PR with a 51% reduction in target lesion size as assessed by RECIST. Two additional patients had unconfirmed PRs and one additional patient demonstrated stable disease with >50% target lesion shrinkage. For evaluation of CBR, 12 patients had sufficient follow-up to be included. Five of 12 patients (42%) achieved CBR (CBR defined as PRs + complete responses + stable disease at 6 months). Three of these five patients had previously received fulvestrant, and another was treated with two investigational SERDs.

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บิลลี่ ภัทรชนน รับบท เหนือ นิมมาน
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