Etiology Acute pericarditis C-Constr-Peric Non-specific ++++ +++ Tumor +++ TB ++ ++++ Radiation therapy ++ System disease Physical and chemical factorsAcute pericarditis C-Constr-Peric Non-specific + + + + + + + Tumor + + + + TB + + + + + + Radiation therapy - + + + System disease + + Physical and chemical factors + + Etiology