[Pathological study of 51 cases of cardiac tumors]

51 cases of cardiac tumors were studied pathologically, including light and electron microscopic observation. Among 47 cases of benign tumors, 46 were cardiac myxomas and one was leiomyoma. Among the remaining 4 cases of malignant cardiac tumors, there were two malignant myxomas, one lymphoma and one metastatic squamous epithelial cell cancer. Cardiac tumors might be grossly divided into three types: papillary, massive and lobular types, while the papillary type was most commonly seen. In this article, diagnosis of cardiac tumors, pathologic features of cardiac myxoma and pathohistological difference between tumor and organized thrombus are discussed.