Intimal Sarcoma: An Extremely Rare Case of a Left Atrial Tumor with Partial Obstruction of the Mitral Orifice

•Primary malignant cardiac tumors are very rare.•This is the first case report of intimal sarcoma of left atrial origin.•Echocardiographic diagnosis of malignant cardiac tumor is critical but challenging.•The authors outline the differentiation of primary malignant cardiac tumors. Approximately 70% of left atrial tumors are identified as myxomas.1Dujardin K.S. Click R.L. Oh J.K. The role of intraoperative transesophageal echocardiography in...