Pulse methylprednisolone therapy for impending cardiac tamponade in immunoglobulin-resistant Kawasaki disease.

We describe a boy with Kawasaki disease (KD) whose clinical course was marked by a rapid improvement upon treatment with intravenous immunoglobulin (IVIG) and oral aspirin, which - within 14 days - was followed by the development of a large pericardial effusion with symptoms of impending cardiac tamponade as part of a polyserositis syndrome (pleural effusions, ascites). Upon treatment with pulsed methylprednisolone, the pericardial and pleural effusions and ascites rapidly disappeared within 48 h. This is the first case reported with a polyserositis syndrome and impending cardiac tamponade during KD.