KATHERINE

ROCHE BO27938

NSABP B-50-I
GBG 77

A randomized, multicenter, open label phase III study to evaluate the efficacy and safety of trastuzumab emtansine versus trastuzumab as adjuvant therapy for patients with HER2-positive primary breast cancer who have residual tumor present pathologically in the breast or axillary lymph nodes following preoperative therapy.