Amy Tiersten, MD

Combining anastrozole with palbociclib, trastuzumab, and pertuzumab as a frontline therapy for hormone receptor–positive, HER2-positive breast cancer may avoid some of the toxicities associated with chemotherapy, says Amy Tiersten, MD.

It may be possible to use anastrozole plus palbociclib, trastuzumab, and pertuzumab in place of chemotherapy in the frontline setting for hormone receptor–positive, HER2-positive metastatic breast cancer, says Amy Tiersten, MD.

A future phase 2 trial may compare anastrozole plus a CDK4/6 inhibitor and trastuzumab or pertuzumab with chemotherapy plus trastuzumab and pertuzumab in hormone receptor–positive, HER2-positive metastatic breast cancer.

Despite a recent decline in incidence and mortality, breast cancer currently develops in one of eight North American women who live to 85 years of age, and remains the major cause of death in American women between the ages of 15 and 54.[1,2]