The levels of circulating cytokines (IL-17, IL-15) and chemokines [macrophage inflammatory protein (MIP)-1α, MIP-1β] are significantly increased in GC-positive SS patients, indicating enhanced migration of immune cells and capability of attracting B cells, T cells, macrophages and DCs for local recruitment in the salivary glands (44). The gene discussed is IL17A; the disease is synovial sarcoma.