We present a previously healthy 43-year-old woman with a cardiac mass that caused
almost total occlusion of the inferior vena cava at its junction with the right atrium.
The resected mass proved to be a thrombus. Preoperative imaging tests could not distinguish
it from other intracardiac tumors such as myxoma. A postoperative immunological study
revealed a primary antiphospholipid syndrome. This case presents an unusual diagnosis
of antiphospholipid syndrome and a rare location of a cardiac thrombus.
Antiphospholipid syndrome - intracardiac mass - thrombus - inferior vena cava
