In recent years, immunotherapy has become one of the important treatments for malignant tumors. Among them, PD-1 inhibitors have been widely used in clinical practice, and have shown a significant survival benefits in many patients. However, the incidence of immune-related adverse reactions (irAEs) of PD-1 inhibitors is relatively high, and severe cases can even threaten patients's life. At present, irAEs have become a bottleneck and it is urgent to establish a prevention strategy for the prediction of irAEs. In this study, the investigators intends to use Sintilimab as the research drug. A prospective cohort study was carried out. Part of the sample which was used as a training set would be detected for producing a time-series multi-dimensional data such as differential genes, metabolites and immune factors. Then gene expression programming (GEP) was used to explore the irAEs recognition model. Then, based on this recognition model, internal verification ( part of samples from the center 1 ) and external verification ( part of samples from the center 2 and center 3 samples) are carried out to accurately predict the high-risk population of irAEs and realize the early-stage warning of Sintilimab induced- irAEs.

Inclusion Criteria:

1. Age ≥18 and ≤75 years old;
2. Subjects with histologically or cytologically confirmed are prepared to receive Sintilimab treatment;
3. Life expectancy of at least 6 months;
4. Eastern Cooperative Oncology Group (ECOG) PS status≤ 2 or Karnofsky (KPS) ≥ 60;
5. No prior immune checkpoint inhibitor treatment
6. Signed written informed consent before any study-related procedure;
7. Adequate hematopoietic function as defined by an absolute neutrophil count ≥1.5×109 /L, platelet count≥80×109 /L, hemoglobin≥90 g/L
8. Adequate hepatic function, defined as a total bilirubin level≤1.5 ×upper limit of normal (ULN); aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels ≤2.5 × ULN in subjects without liver metastases, AST and ALT levels ≤5 × ULN in subjects with documented liver metastases;
9. Adequate renal function, defined as serum creatinine (Cr)≤1.5×ULN or calculated creatinine clearance≥60ml/min (Cockcroft-Gault formula);
10. Serum albumin ≥28g/L;
11. Thyroid-stimulating hormone (TSH)≤1×ULN (if abnormal,subject with the normal levels of FT3 and FT4 can be enrolled).

Exclusion Criteria:

1. Has active autoimmune disease;
2. Severe heart, lung, brain, kidney, gastrointestinal or systemic diseases;
3. has interstitial lung disease;
4. Simultaneous use of drugs that can affect the results of this study;
5. Treatment may interfere with the results of the study
6. Allergy or intolerance to the study drug
7. subject with unconsciousness and psychiatric disorder
8. Pregnant and lactating women
9. Subject with poison and alcohol abuse

Subjects with histologically or cytologically confirmed are prepared to receive Sintilimab treatment