UTSW Rheum Grand Rounds MAS occurs in 2-8% of Systemic JIA pts and has a high mortality (<40%); It is more frequent w/ onset in Years 1-4. Treatment - steroids, anakinra, etoposide or CsA & Rx infxn if present. Oh...dont stop the anakinra! @UTSWRheum https://t.co/09uQm3LURC