This study is a prospective, single arm, multi-center clinical trial. The primary study objective is to evaluate the pathologic complete response (pCR）and clinical complete response（cCR) of neodjuvant treatment of HER2-positive breast cancer with pyrotinib and trastumab combined with neoadjuvant chemotherapy. The secondary study objective is to observe and evaluate the disease-free survival (DFS), Progression-Free-Survival (PFS ),and Objective Response Rate(ORR). The study also observes the incidence and types of adverse events.
T1N1-3M0 or T2-4N0M0
All patients were pathohistologically confirmed as HER2+ breast cancer. HER2 positivity was determined locally and defned as 3+ staining intensity by immunohistochemistry or HER2 gene amplifcation by fuorescence in situ hybridization according to the 2013 American Society of Clinical Oncology/College of American Pathologists guidelines.
Blood routine: Absolute neutrophil count (ANC) greater than 1.5 × 109/L; platelet count (PLT) greater than 75 × 109/L; Hemoglobin (Hb) is greater than 90g/L; Lymphocyte count ≥ 1.5 × 109/L
Blood biochemistry: Total bilirubin (TBIL) is less than 1.5 × ULN; Alanine aminotransferase (ALT) and aspartate (AST) levels are less than 1.5 × ULN; Alkaline phosphatase is less than 2.5 × ULN; Urea nitrogen/Urea (BUN/UREA) and creatinine (Cr) are less than 1.5 × ULN.
Stage IV breast cancer.
Inflammatory breast cancer.
Previously received anti-tumor treatment or radiation therapy for any malignant tumor, excluding those that have been cured malignant tumors such as cervical carcinoma in situ, basal cell carcinoma, or squamous cell carcinoma.
Simultaneously undergoing anti-tumor treatment in other clinical trials, including but not limited to chemotherapy, endocrine therapy, biological therapy, bone improvement drug therapy, or immune checkpoint inhibitor therapy, etc.