Large-vessel arteritis and myelodysplastic syndrome: report of two cases

: Myelodysplastic syndrome (MDS) is frequently associated with autoimmune diseases such as polymyalgia, arthritis, and rarely, with systemic vasculitis. The pathogenesis of these autoimmune complications remains unknown, but there is increasing evidence of profound immune dysregulation in MDS. In the few cases reported so far, vasculitides associated with MDS affected mainly cutaneous vessels. Here we describe two cases of acute large‐vessel...