FCGR2A and myeloid sarcoma: Second, Vedeler et al. [84] established in a review article in 2001 in Norway a typical genetic relationship between MS and GBS; specific Fc-gamma receptors (FcγR) allotypes, such as Fc receptor IIA (FCRIIA) and Fc receptor IIIB (FCRIIIB), were linked to the severity of both disorders.