Breast Cancer Clinical Trial
Official title:
Preoperative Treatment of HR+/HER2+Breast Cancer With Pyrrolitinib Combined With Trastuzumab and AI Efficacy and Safety of: a Single Arm Multicenter Phase II Exploratory Study
Research topic Preoperative efficacy and safety of pyrrolitinib combined with trastuzumab and AI in the treatment of HR+/HER2+breast cancer Overall: A single arm multicenter phase II exploratory study。Subjects HR+/HER2+breast cancer patients in stage Ⅱ~Ⅲ A。
Research topic Preoperative efficacy and safety of pyrrolitinib combined with trastuzumab and AI in the treatment of HR+/HER2+breast cancer Overall: A single arm multicenter phase II exploratory study。Subjects HR+/HER2+breast cancer patients in stage Ⅱ~Ⅲ A。Main research purposes: To explore the efficacy and safety of the combination of large and small molecules (pyrrolidine combined with trastuzumab combined with AI) in the preoperative treatment of early HR+/HER2+breast cancer.Secondary study objective: To explore the feasibility of neoadjuvant descending ladder therapy and the changes in ctDNA to provide clues for screening predictive markers.Primary endpoint: Pathological complete response rate (tpCR: ypT0-is/ypN0)。Secondary end points: optimal overall response rate (BORR), bpCR (ypT0-is), tumor residual load (RCB), disease free survival (DFS), breast retention rate, safety。Pyrrolidine (400mg po qd),Trastuzumab (initial dose 8 mg/kg, follow-up 6 mg/kg ivgtt, d1, Q 3w, total 6 Period),Anatriazole (1mg po qd)/ Letrozole (2.5mg po qd).For premenopausal or perimenopausal patients, it is necessary to combine OFS (OFS includes bilateral eggs Nest removal or GnRHa drugs). ;
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