CD4 and synovial sarcoma: Concerning chronic lymphocytic infiltration in salivary glands without specific autoantibodies in SS, the DILS observed in salivary glands of individuals affected by HIV with the infiltration of CD8+ T cells [148] is a reminder that the dominant infiltration of CD4+ T cells in the salivary glands of HAM-SS patients with hypergammaglobulinemia resembles that observed in DILS.