Study study type PathologyT1T0Patientssample sizesROB Results deaths (OS) Eprogression or deaths (PFS) ERFS/DFS E

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

versus trastuzumab emtansine
trastuzumab deruxtecan
DESTINY Breast03, 2022
  NCT03529110
RCTla/mBC - HER2 positive - 2nd Line (L2)trastuzumab deruxtecantrastuzumab emtansinepatients with HER2-positive metastatic breast cancer previously treated with trastuzumab and a taxane-/-some concern
suggested -45% -72%

metastatic/advanced - breast cancer (mBC) metastatic/advanced - breast cancer (mBC)

versus chemotherapy
trastuzumab deruxtecan
DESTINY-Breast04, 2022
  NCT03734029
RCTmetastatic/advanced - breast cancer (mBC)trastuzumab deruxtecanphysician’s choice of chemotherapypatients with HER2-low metastatic breast cancer who had received one or two previous lines of chemotherapy373 / 184some concern
conclusif demonstrated-36% demonstrated-50%