Myeloid cells in human tissues. (A) Example of staining of melanoma with CD33 and S100A9 antibody. (B) Typical example of staining of tissues from patients with different skin pathologies. (C) The number of different myeloid cells in skin. Each group included five patients. (D) Typical example of staining of tissues from patients with colitis and colon cancer. (A, B, and D) Bars, 50 µm. (E) The number of different myeloid cells in colonic tissues. Control and colon cancer groups included six patients and colitis group included five patients. (C and E) Mean and SD are shown. The differences from control: *, P < 0.05; **, P < 0.01; ***, P < 0.001.