Overview
This study proposes to prove that the efficacy of adjuvant endocrine therapy for the premenopausal HR positive breast cancer patients is non-inferiority to adjuvant chemotherapy assessed by ultrasound response rate.
Eligibility
Inclusion Criteria:
* 35 years old \2cm, SLNB negative), hard to proceed the breast conserving surgery(not feasible or may affect the appearance of breast)
* Histologically confirmed HR+ (ER or PR positive, and \>50% cell in IHC) HER2 negative breast cancer by pathological evaluation
* No other previous treatment for primary breast cancer
* Without other tumor or unstable complication or uncontrolled infection
* No contradiction for the third generation AIs, LHRHa, chemotherapy
* Attend the study voluntarily, sign the informed consent.
Exclusion Criteria:
* Metastasis disease by pathological or radiological diagnosis
* the history of other tumor
* contradiction for the third generation AIs, LHRHa, chemotherapy
* Contradiction for adjuvant chemotherapy: serious cardiology or cerebral vessel disease, liver or kidney disfunction, blood system disease, the other situation or complication that are not suitable or cannot adaptable for chemotherapy
* Contradiction for proceeding surgery: contradiction for anesthesia, large lesion,T4, lymph node positive
* other situation not suitable for the research: psychological disease, mental disorder, social problem, geographic problem
* have been attendance in other anti-tumor treatment or other clinical trials 8) reject to attend the study
