Therefore, we have analyzed polymorphism of these genes in our SA patients and revealed that, in contrast to polymorphism of FCGR2B and FCGR3B, polymorphism of FCGR2A, FCGR2C and FCGR3A may contribute to immunocomplexemia present in sarcoidosis [11,12]. This evidence concerns the gene FCGR2A and sarcoidosis.