IL2 and neoplasm: Laboratory tests showed: N% 78.6%, PLT 405×109/l, eosinophil count 0.01×109/l, CD3+/CD4+T cells count 304.53 cells/ul, ESR 95mm/h, CRP 260.6mg/l, PCT 0.016ng/ml, Lactic acid 4.70mmol/L, IL-2 19.6μg/L, IL-6 210.3μg/L, and other indicators such as tumor markers, EB/respiratory associated virus/hepatitis virus markers, G test, blood bacterial culture, autoimmune disease antibody, Vidal test, complement binding test, T cell test for tuberculosis infection were all negative.