Retrospective review of 113 AOSD pts, median age 45yrs, ferritin 4626 (IQR 1169–14,239). Advanced Rx (IVIG, IL-1, IL-6) required in 15 (13.3%), NOT predicted by ferritin levels, either measured continuously or by quartiles. Ferritin is not a reliable biomarker in AOSD. https://t.co/pHEPeIf9u2