CD163 and neoplasm: At 3 w p.i. the CD163-positive tumor-recruited cells remained outside the tumor area, but strongly increased in the 4T1 inoculation group whereas in the 4T1 + RAW264.7 inoculation group a similar CD163-positive staining was observed at 3 w p.i. compared to 1 w p.i (Fig. 6).