This research study is studying how well newly diagnosed breast cancer that has tested
positive for a protein called HER2 responds using one of two different combination of
HER2-directed therapies as a treatment after surgery.
The name of the study drugs involved are:
- Trastuzumab-emtansine (T-DM1, Kadcyla)
- Trastuzumab SC (Herceptin Hylecta)
- Paclitaxel