An angiosarcoma in the left atrium.

To the Editor: Cardiac angiosarcoma is a rare cancer that accounts for less than 10 percent of all resected primary tumors of the heart; primary tumors of the heart themselves are found in less than 0.3 percent of autopsies.1–3 Angiosarcomas usually originate in the right atrium and are associated with a poor prognosis, since distant metastases are present in the majority of patients at the time of diagnosis.2,4 We describe a patient with an angiosarcoma located exclusively in the left atrium. A 57-year-old woman was referred with a three-month history of exertional dyspnea and intermittent tachycardia. Transesophageal echocardiography . . .