High levels of CCL21/CCR7 expression in the salivary glands of SS patients were associated with elevated erythrocyte sedimentation rate (ESR), IgG and RF levels, anti-Ro/SSA and La/SSB antibody titers, and a higher focus score and European League Against Rheumatism SS disease activity index (ESSDAI) value on biopsy (61, 62). This evidence concerns the gene CCL21 and synovial sarcoma.