ShortStop-HER2: Shortened Duration of Adjuvant Therapy in Patients With Early-Stage HER2+ Breast Cancer Who Achieve pCR After Neoadjuvant Chemotherapy With HER2 Blockade
Alliance for Clinical Trials in Oncology
Summary
This phase III trial compares 6 months of human epidermal growth factor receptor 2 (HER2)-targeted therapy to 12 months of HER2-targeted therapy for the treatment of HER2-positive (+) breast cancer in patients that had a pathologic complete response (pCR) after preoperative (neoadjuvant) chemotherapy with trastuzumab. Trastuzumab and pertuzumab are monoclonal antibodies and forms of targeted therapy that attach to a receptor protein called HER2. HER2 is found on some cancer cells. When trastuzumab or pertuzumab attach to HER2, the signals that tell the cells to grow are blocked and the tumor cell may be marked for destruction by the body's immune system. Giving 6 months of HER2-targeted therapy may work better than giving 12 months for the treatment of HER2+ breast cancer in patients that had a pCR after neoadjuvant chemotherapy with trastuzumab.
Description
The primary and secondary objectives of the study: PRIMARY OBJECTIVES: I. To evaluate whether 6 months of combined neoadjuvant (neo)/adjuvant HER2 blockade results in a non-inferior recurrence-free survival (RFS) compared to 12 months of combined neo/adjuvant HER2 blockade, in patients with early stage HER2+ breast cancer who achieve pCR after neoadjuvant chemotherapy with HER2 blockade. II. To compare the Functional Assessment of Cancer Therapy-Breast (FACT-B) total score at 12 months between patients randomized to receive 6 months versus 12 months of combined neo/adjuvant HER2 blockade. (…