Primary cardiac sarcoma.

Primary cardiac sarcomas are uncommon entities. The diagnosis of sarcoma is not made preoperatively because of the rarity of the lesion and the nonspecific nature of the signs and symptoms. This is a report of a case of primary sarcoma arising from the left atrium, in a patient who presented with acute dyspnoea; the sarcoma resembled an atrial myxoma on echocardiography.