FCGR2A and head and neck squamous cell carcinoma: Although FCGR2A has rarely been reported in HNSCC, our study showed that immune cells, such as memory B, plasma, resting memory CD4+ T, activated memory CD4+ T, follicular helper T, resting and activated dendritic, activated mast, resting and activated NK cells, M0, M1, and M2 macrophages, and neutrophils, were closely associated with FCGR2A expression in HNSCC.