Moreover, the seroprevalence of ANA in Israeli SS patients was previously reported by Friedman et al. to be 50%, RF 20%, anti-SSA/Ro 7% and anti-La 9% [28], while Kivity et al. reported that anti-SSA/Ro antibodies were detected in 62%, anti-SSB in 38%, ANA in 83%, anti-RNP in 11%, and DS-DNA in 27% [29]. Here, SSB is linked to synovial sarcoma.