For the purpose of correlation analysis we have retrieved data on systemic concentrations of IL-1β, IL-4, IL-6, IL-8, IL-12p70, FGF2, G-CSF, GM-CSF, MCP-1, MIP-1α, PDGF-BB, TNFα, and VEGF-A, available for 43 of our cancer patients. The gene discussed is IL6; the disease is cancer.