IFNG and synovial sarcoma: Hallmarks of SS-associated markers include autoantibodies, such as anti-SSA and anti-SSB, IFNγ and other cytokines; however, these markers are also associated with other autoimmune diseases such as RA, SLE, or polymyositis and are therefore not specific to SS (Burbelo et al., 2009; Dufour et al., 2018; Seror et al., 2021).