Churg-Strauss syndrome presenting with marked eosinophilia and pericardial effusion.

The Churg-Strauss syndrome is a rare but treatable clinical entity. Its clinical presentation is thought to be stereotypic but is not. The authors report the first instance of a patient with the Churg-Strauss syndrome with hemodynamically significant pericardial effusion but without concurrent active pulmonary, renal or neurological involvement. Pericardial biopsy was the key to diagnosis and, therefore, therapy.