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학술저널
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이지은 (가톨릭대학교) 박형순 (가톨릭대학교) 원혜성 (가톨릭대학교) 양지현 (가톨릭대학교(성의교정)) 이희연 (가톨릭대학교) 우인숙 (가톨릭대학교) 신갑수 (가톨릭대학교) 홍지형 (가톨릭대학교) 양영준 (가톨릭대학교) 전상훈 (가톨릭대학교(성의교정)) 변재호 (울산대학교)
저널정보
대한암학회 Cancer Research and Treatment Cancer Research and Treatment 제53권 제2호
발행연도
2021.1
수록면
409 - 423 (15page)

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Purpose Use of cyclin-dependent kinase 4/6 inhibitors improved survival outcome of hormone receptor (HR) positive metastatic breast cancer (MBC) patients, including Asian population. However, Asian real-world data of palbociclib is limited. We analyzed the real-world clinical practice patterns and outcome in HR-positive, MBC Asian patients treated with palbociclib. Materials and MethodsBetween April 2017 to November 2019, 169 HR-positive, human epidermal growth factor-2?negative MBC patients treated with letrozole or fulvestrant plus palbocilib were enrolled from eight institutions. Survival outcome (progression-free survival [PFS]), treatment response and toxicity profiles were analyzed. ResultsMedian age of letrozole plus palbociclib (145 patients, 85.8%) and fulvestrant plus palbociclib (24 patients, 14.2%) was 58 and 53.5 years, with median follow-up duration of 14.63 months (range 0.2 to 33.9 months). Median PFS (mPFS) of letrozole plus palbociclib and fulvestrant plus palbociclib was 25.6 (95% confidence interval [CI], 19.1 to not reached) and 6.37 months (95% CI, 5.33 to not reached), comparable to previous phase 3 trials. In letrozole plus palbociclib arm, luminal A (hazard ratio, 2.86; 95% CI, 1.20 to 6.80; p=0.017) and patients with good performance (Eastern Cooperative Oncology Group 0-1 [hazard ratio, 3.68; 95% CI, 1.70 to 7.96]) showed better mPFS. In fulvestrant plus palbociclib group, chemotherapy naive patients showed better mPFS (hazard ratio, 12.51, 95% CI, 1.59 to 99.17; p=0.017). The most common grade 3 or 4 adverse event was neutropenia (letrozole 86.3%, fulvestrant 88.3%).ConclusionTo our knowledge, this is the first real-world data of palbociclib reported in Asia. Palbociclib showed comparable benefit to previous phase 3 trials in Asian patients during daily clinical practice.

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