Immunohistochemical detection of macrophages in NSCLC tumor islets. a) The M1 macrophage double stained with the anti-CD68 (red) and anti-HLA-DR (black-purple) antibodies (arrow). b) The M2 macrophages double stained with the anti-CD68 (red) and anti-CD163 (black-purple) antibodies (arrow). c) The M1 macrophage marker HLA-DR stained black-purple (arrowhead) and the M2 macrophage marker CD163 stained red (arrow). Original magnification, × 1000 for a & b, and × 400 for c.
Ma et al. BMC Cancer 2010 10:112 doi:10.1186/1471-2407-10-112