Tumour‐associated macrophages are characterized by high expression of CCL2, CCL5, and IL‐10 and by MGL1, dectin‐1, CD81, VEGF‐A, CD163, CD68, CD206, arginase‐1 (Arg‐1), nitric oxide synthase 2 (NOS2), MHC‐II and scavenger receptor A 62. The gene discussed is NOS2; the disease is neoplasm.