There were significant correlations between ΔSUVmax on the second [18F]FDG PET/CT at three months and total cells densities for CD8 + in the stroma and macrophages in the tumour (Rho = -1 and 1, respectively; all p = 0.017) and a borderline association between CD8 + total cells density in the tumour (Rho = -0.90; p = 0.08). The gene discussed is CD8A; the disease is neoplasm.