Moreover, consecutive DAB stained slides of CD163 positive macrophages and FcγR positive cells showed that the amount of FcγRI, II and III expression was significantly correlated with CD163 expression in the RA synovia (FcγRI, r = 0.65, p = 0.012; FcγRII, r = 0.85, p = 0.0001; FcγRIII, r = 0.75, p = 0.002), which confirms the results of the immunofluorescence stainings. This evidence concerns the gene FCGR2A and rheumatoid arthritis.