{Reference Type}: Case Reports {Title}: Primary cardiac angiosarcoma directly invading the right lung: An autopsy report. {Author}: Kiwaki T;Ishihara A;Toyama T;Kusaka H;Kataoka H; {Journal}: Clin Case Rep {Volume}: 9 {Issue}: 8 {Year}: Aug 2021 暂无{DOI}: 10.1002/ccr3.4582 {Abstract}: We presented a difficult-to-diagnose case of cardiac angiosarcoma. The patient presented pericardial effusion, but cytology of the effusion was negative. Because cytological detection of angiosarcoma cells is difficult, a possibility of malignancy should not be excluded with negative cytological examination. Biopsy of cardiac mass is the best way for diagnosis.