NCAM1 and neoplasm: No CD56-positive immune cells could be detected in the tumor bed infiltrated by immune cells as displayed in the center column of Figure 4a, whereas double staining of LDOC1 and CD68 (Figure 4b) as a marker for macrophages as well as FOXP3 (Figure 4c) as a marker for regulatory T cells showed positive results, as illustrated in the Figure 4b,c by green stained cells.