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A 55 year woman was referred for evaluation of an atrial mass seen on transthoracic echocardiography. She had presented to her primary care physician with palpitations and atypical chest pain. Transoesophageal echocardiography (top) revealed a well circumscribed mass in the region of the interatrial septum (IAS). The patient was taken to the operating room. After institution of cardiopulmonary bypass, the right atrium (RA) was incised. The mass was confined to the interatrial septum. It was completely resected, and the septal defect closed with a pericardial patch. Pathologic examination was consistent with a haemangioma (bottom). The patient made an uneventful recovery and was discharged home on the fourth postoperative day.