Advances and future directions in the targeting of HER2-positive breast cancer: implications for the future.

OPINION STATEMENT: The natural history of HER2-positive breast cancer significantly changed in the past 15 years. Form being the most aggressive type of breast cancer, it became treatable with important cure rates. However, with new and successful drugs, resistance emerges. Progress in research and drug development continues to make available effective anti-HER2 therapies. Our challenge today is to use these tools correctly by looking at the data that support the indications of each compound and to continue clinical trial participation.