There are several causes of<unk> . In developed nations, the cause of most (80–90%) cases of<unk>  is unknown but a viral cause is suspected in the majority of such cases. The other 10–20% of<unk>  cases have various causes including connective tissue diseases (e.g., systemic lupus erythematosus), cancer, or involve an inflammatory reaction of the pericardium following trauma to the heart such as after a heart attack such as Dressler's syndrome. Familial mediterranean fever and TNF receptor associated periodic syndrome are rare inherited autoimmune diseases capable of causing recurring episodes of<unk> .
Acute pericarditis
Myocardial stunning
Wooden chest syndrome
Uremic pericarditis
Acute coronary syndrome
Acute chest syndrome
Constrictive pericarditis
Unstable angina