IL6 and cancer: This study included both pro‐inflammatory (IL‐1B, IL‐6, IL‐8, IL‐12 (p40, p70), TNF‐α, and IFN‐γ), and anti‐inflammatory (IL‐4, IL‐6, IL‐10, TGF‐β), peripheral cytokine blood serum markers with no significant findings evident between cancer survivors and matched controls.