默沙东（MRK）旗下重磅抗癌药物Keytruda（中文商品名可瑞达）获得扩大适应症使用的监管批准。美国食品药品监督管理局（FDA）已批准Keytruda用于治疗肿瘤表达PD-L1蛋白、可切除的局部晚期头颈部鳞状细胞癌成年患者。

　　该研究首席研究员Ravindra Uppaluri博士表示，此次获批“可能显著改变我们治疗这类疾病的方式”。

　　Uppaluri博士补充道，与标准辅助放化疗或单独放疗相比，Keytruda“已被证实能将复发、进展或死亡风险降低30%”。

　　默沙东指出，预计2025年全美将诊断约72680例新发头颈癌病例，并有超过16，680例死亡病例。Keytruda作为该公司最畅销药物，第一季度营收达72亿美元，占总销售额近半数。

　　截至周五交易日开盘，默沙东股价年内累计下跌约18%。

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