IL2 and neoplasm: When cytokine production was examined by flow cytometry, the IL-2 levels in the B16F10 cell line and at 7, 14 and 21 days of tumor growth were 45.72 pg/ml and 4.88, 7.37 and 13.55 pg/ml, respectively, and the IFN-γ levels were 1.05 pg/ml and 7.02, 3.75 and 0.95 pg/ml, respectively.