Can’t a clinician usually differentiate dermatomysitis skin changes from cutaneous lupus and if not would it affect your Rx of the skin involvement - HCQ, MMF, MTX, Aza & topicals. IL18 sigatures. But I get it. Impt for pathogenesis! @RheumNow #ACR2020 @CRASCRRheum https://t.co/RJh7fEVo4O