Increased expression of CD206 on macrophages has been demonstrated after stimulation with interleukin‐4 (IL‐4), IL‐13, and granulocyte‐macrophage colony‐stimulating factor in vitro,9, 10 and CD206 is considered a marker of tumor‐associated macrophages (TAMs).11 The gene discussed is MRC1; the disease is neoplasm.