IL4 and cancer: There were no significant differences between the cancer survivors and matched healthy controls in any of the peripheral inflammatory cytokine biomarkers: blood serum CRP, CSF, IFN‐γ, IL‐10, IL‐12(p40), IL‐12(p70), IL‐1β, IL‐4, IL‐6, IL‐8, TNF‐α, TGF‐β1,2, or 3.