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Intern Med. 1998 Dec;37(12):1023-6.

Primary cardiac angiosarcoma of the right atrium undiagnosed by transvenous endocardial tumor biopsy.

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Department of Medical Cardiology, Tokyo Women's Medical College.


A 50-year-old man was admitted with acute pericarditis. Echocardiography demonstrated a large mass on the right atrial free wall along with a pericardial effusion. We performed transvenous biopsy of this mass under transesophageal echocardiographic guidance. Though the biotome obtained the mass, the pathological findings were of organized thrombus. Two weeks later, a new precordial mass appeared around the left third rib and was suspected to be a metastasis. Incisional biopsy of this mass gave the diagnosis of angiosarcoma.

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