IL17A and synovial sarcoma: Recent studies have supported the role of T helper 17(Th17) cells in SS-related skin conditions, evidenced by elevated levels of Interleukin-17 (IL-17), IL-6, and IL-12 (Grisius et al., 1997; Manoussakis et al., 2007; Nguyen et al., 2008; Yoshimoto et al., 2011; Ciccia et al., 2012; Ciccia et al., 2015; Fogel et al., 2018).