A cardiac malignant primary tumor: Left atrium myxosarcoma—A case report

Abstract Myxosarcoma only accounts for a very small proportion of primary malignant tumors of the heart. The disease has no specificity in clinical manifestations or features on medical images. In this case study, we report about a middle‐aged female patient afflicted with cardiac myxosarcoma. The initial transthoracic echocardiography of the patient revealed a cardiac myxoma. However, the postoperative histopathology confirmed the presence of a malignant cardiac myxosarcoma. Post‐surgery follow‐up imaging examinations revealed local recurrence in the left atrium as well as soft‐tissue and bone metastases. The recurrent tumor and metastases were subsequently treated with chemotherapy and radiotherapy. However, the tumor did not respond to treatment and the disease progressed.