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The initial transthoracic echocardiography of the patient revealed a cardiac myxoma. However, the postoperative histopathology confirmed the presence of a malignant cardiac myxosarcoma. Post\u2010surgery follow\u2010up imaging examinations revealed local recurrence in the left atrium as well as soft\u2010tissue and bone metastases. The recurrent tumor and metastases were subsequently treated with chemotherapy and radiotherapy. 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