An Askin-Rosai tumour presenting as effusive constrictive pericarditis is reported. A 2-D echocardiogram was strongly suggestive of a primary pericardial tumour, and multiple pericardial and pleural aspiration failed to yield malignant cells. The final diagnosis was made at autopsy. Primary pericardial Askin-Rosai tumour has not to our knowledge been previously reported.
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