deaths (OS)progression or deaths (PFS)RFS/DFS

la/mBC - HER2 positive - 2nd Line (L2) breast cancer - HER2-positive la/mBC - HER2 positive la/mBC - HER2 positive - 2nd Line (L2)

versus trastuzumab plus capecitabine
tucatinib plus trastuzumab plus capecitabine vs. trastuzumab plus capecitabine 2 -1037 [-1854; -221] /10000
130/410 vs. 85/202
-500 [-1432; 432] /10000
178/320 vs. 97/160
-