Camrelizumab Plus Docetaxel and Cisplatin in Recurrent or Metastatic Oral Squamous Cell Carcinoma Patients

Inclusion Criteria:

* Patients with histologically confirmed post-surgical recurrent/metastatic or locally advanced inoperable oral squamous carcinoma with measurable lesions (spiral CT scan ≥ 10 mm, meeting RECIST 1.1 criteria).
* No prior treatment with any systemic antineoplastic agent, prior adjuvant or neoadjuvant therapy (other than PD-1/PDL-1 monoclonal antibody) is allowed, provided that it was completed at least 4 weeks prior to the first dose of study drug and all associated toxic events have returned to normal or to grade I or below as defined by CTCAE 4.03 classification.
* An ECOG score of 0 or 1.
* Expected survival of ≥ 12 weeks.
* Normal function of major organs within 2 weeks prior to treatment, i.e. meeting the following criteria.

Bone marrow function: hemoglobin ≥ 100gg/L, white blood cell count ≥ 4.0\*10\^9/L or neutrophil count ≥ 2.0\*10\^9/L and platelet count ≥ 100\*10\^9/L without transfusion or with colony-stimulating factor support therapy.

Liver: serum total bilirubin level ≤ 1.5 times the upper limit of normal, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 1.5 times the upper limit of normal.

Renal: blood creatinine level less than 1.5 times the upper limit of normal or creatinine clearance ≥ 60 ml/min and urea nitrogen ≤ 200 mg/L. Urine protein \<+, if urine protein + then total 24 hour protein must be \<500mg.

Blood glucose: within normal range and/or with diabetic patients on treatment but with stable blood glucose control.

Pulmonary function: baseline FEV1 of at least 2L, if baseline FEV1 \< 2L, FEV1 \>800ml is expected after surgery as assessed by a surgical specialist.

Cardiac function: no myocardial infarction within 1 year; no unstable angina; no symptomatic severe arrhythmia; no cardiac insufficiency.

* Women of childbearing potential must have a negative serum pregnancy test result within 7 days prior to the first dose of the test drug; men of childbearing potential or women of childbearing potential must use a highly effective contraceptive method (e.g., oral contraceptive pill, intrauterine device, abstinence from sexual intercourse, or barrier contraceptive method combined with spermicide) throughout the trial and continue to use contraception for 12 months after the end of treatment.

Exclusion Criteria:

* Patients with prior anti-PD-1, anti-PD-L1, anti-PD-L2 therapy. Patients who are currently receiving antineoplastic therapy.
* Patients who have participated or are participating in a clinical trial of another drug/therapy within 4 weeks prior to the first dose of the study drug.
* Patients with any active autoimmune disease or history of autoimmune disease (e.g., the following, but not limited to: autoimmune hepatitis, interstitial pneumonia, uveitis, enterocolitis, hepatitis, pituitary inflammation, vasculitis, nephritis, hyperthyroidism; patients with vitiligo; asthma that has completely resolved in childhood and does not require any intervention in adulthood may be included; patients who require medical intervention with bronchodilators (asthma, on the other hand, cannot be included).
* Patients who are on immunosuppressive, or systemic hormone therapy for immunosuppressive purposes (doses \>10 mg/day prednisone or other equipotent hormone) and are continuing to use them within 2 weeks prior to enrollment.
* Patients who have received hematopoietic stimulating factors, such as granulocyte colony-stimulating factor (G-CSF), erythropoietin, etc., within 1 week prior to the first administration of the study drug.
* Positive test results for HIV antibodies or syphilis spirochete antibodies. Patients with active hepatitis B or C:
* If HBsAg or HBcAb is positive, add HBV DNA test (the result is higher than the upper limit of the normal range).
* Additional HCV RNA testing if positive for HCV antibodies (results above the upper limit of the normal range).
* Persons with known hypersensitivity to recombinant humanized PD-1 monoclonal antibody drugs and their components.
* Massive pleural or ascites fluid with clinical symptoms and requiring symptomatic management.
* Active lung disease (interstitial pneumonia, pneumonia, obstructive lung disease, asthma) or a history of active tuberculosis.
* Have any clinical problems beyond their control, including but not limited to: Persistent or active (severe) infection;
* Poorly controlled diabetes;
* Cardiac disease (Class III/IV congestive heart failure or heart block as defined by the New York Heart Association);
* Have or suspect autoimmune disease, or a history of autoimmune disease or syndrome requiring steroid/immunosuppressive systemic therapy, such as: hypopituitaritis, colitis, hepatitis, nephritis, hyperthyroidism, hypothyroidism, etc;
* Deep vein thrombosis or pulmonary embolism; myocardial infarction; severe or unstable arrhythmia or angina; percutaneous coronary intervention, acute coronary syndrome, coronary artery bypass grafting; cerebrovascular accident, transient ischemic attack, cerebral embolism within 6 months prior to first dose.
* Abnormal coagulation (INR \> 2.0, PT \> 16s), with bleeding tendency or on thrombolytic or anticoagulant therapy, allowing prophylactic use of low-dose aspirin, low-molecular heparin.
* Those who had clinically significant bleeding symptoms or clear bleeding tendency within 3 months prior to randomization, such as daily cough/hemoptysis of 2.5 ml or more, gastrointestinal bleeding, esophagogastric fundic varices at risk of bleeding, bleeding gastric ulcers or suffering from vasculitis, etc., may be reviewed if the fecal occult blood is positive at baseline, and if it is still positive after review, gastroscopy is required, and if gastroscopy indicates severe esophagogastric fundic varices cannot be enrolled (except for those who underwent gastroscopy 3 months or less before enrollment to exclude such conditions).
* Known presence of hereditary or acquired bleeding and thrombotic tendencies (e.g., hemophiliacs, coagulation disorders, thrombocytopenia, etc.)
* Have received a stem cell transplant or organ transplant.
* Those with a history of psychotropic substance abuse and unable to abstain or a history of mental disorders.
* Other serious, acute or chronic medical conditions or laboratory test abnormalities that, in the judgment of the investigator, may increase the risk associated with participation in the study, or may interfere with the interpretation of study results.
* The patient had a history of other malignancies within five years.