Churg-Strauss syndrome as an unusual cause of spontaneous atraumatic intra-pericardial thrombosis.

Intra-pericardial thrombosis is usually due to haemorrhage into the pericardial space or after traumatic pericardiocentesis. An unusual case of spontaneous atraumatic intra-pericardial thrombosis due to Churg-Strauss syndrome, which responded well to immunosuppressive therapy, is presented.