This study is to explore the treatment of advanced sarcomatoid carcinoma or Carcinosarcoma with Carrelizumab combined with Apatinib, in order to provide guidance and experience for new combined therapy in clinic.

A number of clinical studies have shown that PD-1 immunotherapy combined with anti-vascular target drugs has achieved good clinical efficacy in primary liver cancer, nasopharyngeal carcinoma, esophageal cancer and other tumors. For sarcomatoid carcinoma, which is a rare tumor with large heterogeneity, poor treatment effect and poor prognosis, clinicians are facing great confusion on how to find a good treatment regimen in clinic. The purpose of this study is to explore the treatment of advanced sarcomatoid carcinoma with PD-1 antibody Camrelizumab combined with anti-vascular target drug Apatinib.

Inclusion Criteria:

1. Age 18 ~ 75 years old, and gender is not limited;
2. Advanced patients with sarcomatoid carcinoma or carcinosarcoma confirmed by histopathology;
3. Patients with sarcomatoid carcinoma who have not received systematic drug treatment or have received first-line treatment;
4. The physical condition score (PS) of Eastern cancer cooperation group (ECoG) was 0 ~ 2;
5. The expected survival time is more than 3 months;
6. Within 7 days (including 7 days) before screening, the laboratory test data shall be Calculation: neutrophil count ≥ 1.5 × 109 / L, platelet count ≥ 90 × 109 / L, hemoglobin ≥ 90g / L (no blood transfusion within 14 days), total serum bilirubin ≤ 1.25 times the upper limit of normal (ULN); ALT and AST ≤ 2.5 x ULN (patients with liver metastasis ≤ 5x ULN); Serum creatinine ≤ 1.25 x ULN;
7. Measurable lesions (RECIST 1.1 standard);
8. The subjects (or their legal representative / Guardian) must sign the informed consent form, indicating that they understand the purpose of the study, understand the necessary procedures of the study, and are willing to participate in the study.

Exclusion criteria

Those who have one or more of the following are not eligible for this study:

1. Patients who have previously received anti-vascular targeted drugs or PD-1 mAb;
2. Received any experimental drugs or antitumor drugs within 4 weeks before enrollment; History of other tumors in the past five years, except cured cervical cancer or skin basal cell carcinoma;
3. Symptomatic brain or meningeal metastasis (unless the patient has received treatment for > 6 months, the imaging result is negative within 4 weeks before entering the study, and the clinical symptoms related to the tumor are stable at the time of entering the study);
4. Clinically significant active bleeding;
5. Pregnant or lactating women; Those who are fertile and do not take adequate contraceptive measures;
6. Alcohol or drug addiction;
7. Patients with active or history of autoimmune diseases that may recur (such as systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, autoimmune thyroid disease, multiple sclerosis, vasculitis, glomerulitis, etc.), or patients with high risk (such as organ transplantation and immunosuppressive treatment). Except for autoimmune hypothyroidism requiring hormone replacement therapy only or skin diseases without systemic treatment.
8. Patients requiring systemic corticosteroids (equivalent to > 10mg prednisone / day) or other immunosuppressive drugs within 14 days before enrollment or during the study. Use topical or inhaled glucocorticoids, or use glucocorticoids for short-term (≤ 7 days) to prevent or treat non autoimmune and infrequent allergic diseases.
9. Important organ failure or other serious diseases, including interstitial pneumonia, clinically related coronary artery disease, cardiovascular disease, or myocardial infarction, congestive heart failure, unstable angina pectoris, symptomatic pericardial effusion or unstable arrhythmia within 6 months before enrollment;
10. Have a history of infection with human immunodeficiency virus, or suffer from other acquired and congenital immunodeficiency diseases, or have a history of organ transplantation or stem cell transplantation;
11. Patients with chronic hepatitis B or active hepatitis C. HBV carriers, stable hepatitis B after treatment (DNA titer less than 103 copies /ml) and cured hepatitis C patients (negative for HCV RNA test) can be enrolled.
12. Serious neurological or psychiatric history; Severe infection; Active disseminated intravascular coagulation or other concomitant diseases that seriously endanger the safety of the patient or affect the completion of the study according to the judgment of the investigator.