FCGR3A and graft versus host disease: The results of GSEA analysis indicated that LGG samples in the high expression group of FCGR3A gene were mainly enriched in allograft rejection, autoimmune thyroid disease, graft-versus-host disease, JAK−STAT signaling pathway, viral myocarditis, and the response of stress signaling pathway, indicating that FCGR3A may be involved in multiple biological processes in the occurrence and development of LGG.