In any event, recent observational studies in SS patients and animal models of primary SS have identified the presence of IL-17A and its activating cytokine IL-23 in the lymphocytic infiltrates of the exocrine glands, as well as higher levels of circulating IL-17A in both sera and saliva [8], raising the question of the importance of IL-17 in SS. The gene discussed is IL17A; the disease is synovial sarcoma.