A mobile mass - a left atrial undifferentiated sarcoma mimicking myxoma： a case report

The incidence of primary cardiac tumors is extremely low, ranging from 0.0017% to 0.019%.^1 Primarytumors can be categorized into benign or malignant tumors, in which 75% of primary tumors are benign with myxomas comprising 50% of the cases. On the other hand, malignant tumors constitute less than 25% of primary cardiac neoplasms and are manifested predominantly as sarcoma in various forms.