This case highlights that primary undifferentiated pleomorphic sarcoma of the left atrium can mimic a myxoma and present as acute pulmonary edema.
Left atrial masses require tissue diagnosis regardless of echocardiographic appearance; this case extends the reported mimics of myxoma.
A 37-year-old woman was admitted to Dong-A University Hospital for rapidly progressive congestive heart failure. Transthoracic echocardiography demonstrated a large mass with a stalk that appeared to be a myxoma on the posterior wall of the left atrium. However, the histological diagnosis was undifferentiated pleomorphic sarcoma. We report a case of primary undifferentiated pleomorphic sarcoma of the left atrium with acute pulmonary edema caused by mitral inflow obstruction.
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Suh et al. (2007) studied this question.
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