Primary Pericardial Synovial Sarcoma: An Extremely Rare Cardiac Neoplasm.

Primary pericardial tumors are an entity that is infrequently encountered and may be a cause of pericardial effusion. Primary synovial sarcomas of the pericardium are even rarer malignant invasive tumors that are a challenge to recognize due to their vague presentation and difficulty in diagnosing non-invasively. Here, we report a case of a 48-year-old gentleman of South Asian descent, who was incidentally found to have pericardial and bilateral pleural effusions and subsequently diagnosed to have primary pericardial synovial sarcoma.