MRC1 and neoplasm: There was also a borderline association between SUVmax TL/ SUVmean fat-tissue ratio and CD8 + Total in the tumour (Rho = -0.77; all p = 0.1) and MTV values measured on SPECT/CT at 1-h and CD206 + PD1 + total cells density in the stroma (Rho = 0.66; p = 0.18).