A case of refractory Kawasaki disease complicated by peripheral ischemia.

Kawasaki disease (KD), an acute systemic vasculitis that primarily affects infants and young children, is occasionally refractory to initial high-dose intravenous immunoglobulin (IVIG). Some patients with KD develop peripheral gangrene as a fatal complication, though this is rare. There has been no case reported in the literature of complicated peripheral gangrene that completely resolved without sequelae. Recently, we encountered a patient with KD which was refractory to IVIG, later developing peripheral gangrene. For the treatment of a peripheral gangrene dexamethasone, methotrexate, and an anticoagulant were administered, resulting in resolution of the gangrenous lesions without sequelae. Early diagnosis and treatment can reduce permanent sequelae and mortality from refractory KD complicated by peripheral ischemia.