To Evaluate the Efficacy of Toripalimab Combined With Chemotherapy After HIFU Induction in the Treatment of Early Triple-negative Breast Cancer

Inclusion Criteria:

1. Female patients aged ≥ 18 years who require a negative pregnancy test for premenopausal and perimenopausal patients and promise to take reliable contraceptive measures during treatment;
2. Histopathologically confirmed breast cancer patients who are negative for estrogen receptor (ER), progesterone receptor (PR), and HER-2 by immunohistochemistry; positive PD-L1 expression in tumor cells (≥ 1%);
3. triple-negative breast cancer patients without distant metastasis;
4. According to the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, they have at least one evaluable target lesion;
5. ECOG PS score: 0 - 1;
6. New York Heart Association (NYHA) functional class I;
7. Electrocardiogram without myocardial ischemia, echocardiography LVEF \> 55%, cardiac markers: cardiac troponin I (cTnI) and brain natriuretic peptide (BNP) test values within the normal range;
8. Normal major organ function, Meet the following criteria:

WBC ≥ 4.0 × 10 9/L,Neutrophil count (ANC) ≥ 1.5 × 10 9/L; platelet ≥ 100 × 10 9/L; hemoglobin ≥ 10 g/dL; serum creatinine ≤ 1.5 × upper limit of normal (ULN); aspartate aminotransferase (AST) ≤ 2.5 × ULN; alanine aminotransferase (ALT) ≤ 2.5 × ULN; total bilirubin ≤ 1.5 × ULN; serum creatinine ≤ 1.5 × ULN;

9\) The subject is able to understand the study procedures, voluntarily join the study, sign the informed consent form, have good compliance, and cooperate with the follow-up.

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Exclusion Criteria:

1. Patients during pregnancy and lactation, women of childbearing age who refuse to take effective contraceptive measures during the study period; Patients with peripheral nervous system disorders caused by diseases or those with a history of significant mental disorders and central nervous system disorders;
2. Serious or uncontrolled infections that may affect the evaluation of study treatment or study results, including but not limited to: active hepatitis virus infection, human immunodeficiency virus (HIV) antibody positive, lung infection, etc.;
3. Known allergy to the active ingredients or other components of the study drug or surgical contraindications;
4. In addition to cured basal cell carcinoma of the skin and cured cervical carcinoma in situ, other cancers are disease-free for less than 5 years;
5. Severe liver disease (such as cirrhosis, etc.), kidney disease, respiratory disease or uncontrolled diabetes, active gastrointestinal ulcers and other need treatment;
6. Need to receive other anti-tumor therapy (except ovarian function inhibitors) during neoadjuvant therapy as judged by the investigator;
7. Patients who are participating in other clinical trials within one month;
8. Patients with severe heart disease or discomfort, Expected intolerance to chemotherapy,Including, but not limited to: a. fatal arrhythmia or higher grade atrioventricular block (second-degree type 2 \[Mobitz 2\] atrioventricular block or third-degree atrioventricular block); b. unstable angina pectoris; c. clinically significant valvular heart disease; d. transmural myocardial infarction on electrocardiogram; e. uncontrolled hypertension;
9. any other condition that in the opinion of the investigator would make the patient inappropriate for participation in this study.