CXCL11 levels in AOSD patients (211.9 ± 204.5 pg/mL) were higher than those in RA patients (56.2 ± 64.0 pg/mL; p < 0.001) and HCs (46.1 ± 29.2 pg/mL; p < 0.001). This evidence concerns the gene CXCL11 and adult-onset Still disease.