Atrial myxoma commonly arises from-

Primary cardiac tumors are uncommon; moreover, most also are (founately) benign. The five most common have no malignant potential and account for 80% to 90% of all primary hea tumors. In descending order of frequency, these are myxomas, fibromas, lipomas, papillary fibroelastomas, and rhabdomyomas. Angiosarcomas constitute the most common primary malignant tumor of the hea. Myxomas are the most common primary tumors of the adult hea . Roughly 90% are atrial, with the left atrium accounting for 80% of those. (Robbins Basic Pathology,9th edition,pg no.404)