%0 Case Reports %T Cardiac Angiosarcoma Presenting as Large Pericardial Effusion With Effusive-Constrictive Pericarditis. %A Vicenty-Rivera S %A Diaz-Rodriguez PE %A Molina-Lopez VH %A Machuca JN %J Cureus %V 16 %N 5 %D 2024 May %M 38903323 暂无%R 10.7759/cureus.60623 %X Pericardial angiosarcoma is an extremely rare malignant tumor originating from the endothelial cells of blood vessels within the pericardium. We present a case of a 49-year-old male who presented with symptoms of pericardial effusion and was subsequently diagnosed with pericardial angiosarcoma. This case report highlights the diagnostic challenges and management options associated with this rare entity.