心脏原发瘤少见，继发瘤相对多见，但总体而言，还是较少见的（在所有恶性肿瘤中，仅有大约5%～10%的发生心脏转移）。在心外膜的表面可见灰白色转移性肿瘤结节。转移性肿瘤可导致出血性心包炎。
Primary tumors of the heart are uncommon. Metastases to the heart are more common, but rare overall (only about 5 to 10% of all malignancies have cardiac metastases). Seen over the surface of the epicardium are pale white-tan nodules of metastatic tumor. Metastases may lead to a hemorrhagic pericarditis.