CD163 and neoplasm: In order to detect potential differences in infiltration rates in PSCC, CD14+ (Figure 1A), CD68+ (Figure 1B) and CD163+ (Figure 1C) cell populations were quantified and compared between the following spatial compartments: intratumoral tumor (IT Tumor), intratumoral stroma (IT Stroma), peritumoral tumor (PT Tumor) and peritumoral stroma (PT Stroma) (Figures 1D-I).