Optimal duration of prior endocrine therapy predicts the efficacy of Fulvestrant in a real ‐world study for patients with hormone receptor‐positive and HER2‐negative advanced breast cancer

This study provided first ‐hand data regarding the efficacy and safety profile of fulvestrant 500 mg in Chinese patients with HR+/HER2‐ MBC. We successively collected all patients treated with fulvestrant within a certain period of time to delineate the pattern of real‐world practice. The study identified potential de terminants that were significantly associated with PFS of fulvestrant 500 mg. AbstractFulvestrant 500  mg is standard of care for endocrine therapy‐naive or pretreated women with hormone receptor‐positive (HR+) metastatic breast cancer (MBC). This study was conducted to explore the potential factors and duration of last endocrine therapy as predictors for the efficacy of fulvestrant 500 mg on Chinese patients in real‐world practice. Two hundred and fifty‐two MBC patients who were treated with fulvestrant 500 mg consecutively between January 2011 and December 2015 in our institute were included in this study. Efficacy outcomes included progression‐free survival (PFS), overall survi val (OS), and clinical benefit rate (CBR). The optimal cut‐off value for duration of last endocrine therapy was determined by survival ROC analysis. Adverse events were graded according to NCI‐CTC AE 4.0. Fulvestrant 500 mg demonstrated a median PFS of 5.8 months (95%CI 4.6‐6.9), and a media n OS of 35.9 months (95%CI 30.2‐41.4). CBR was 41.3% (95%CI 35‐47). Liver metastasis, bone alone metastasis, lines of endocrine therapy for MBC, and sensitivity to...
Source: Cancer Medicine - Category: Cancer & Oncology Authors: Tags: ORIGINAL RESEARCH Source Type: research