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- Received September 25, 2009
- Accepted October 8, 2009
- Published online March 9, 2010.
A 43-year-old woman with a prior history of isolated cutaneous erythematosus lupus treated by chloroquine alone was admitted for dyspnea. A computed tomography scan revealed an unexpected intracardiac mass. Cardiological examination, electrocardiogram, and chest X-ray revealed no data of interest. Transesophageal echocardiography indicated the cystic and mobile nature of the lesion, which was found attached to the free wall of the right atrium close to the inferior vena cava. Cardiac magnetic resonance imaging revealed a well-delimited 26 × 27 mm round image, with a spontaneous isointense signal in T1 and hyperintense signal in T2 (A to D); after administration of contrast no peripheral or central enhanced signal was revealed. A completely transparent cyst with homogenous characteristics was fully excised under cardiopulmonary bypass (E to I, Online Videos 1 and 2). Bacteriological analysis was negative, and histological examination confirmed the diagnosis of an endocardial cyst of the right atrium (E to I). The post-operative course was uneventful.
- Received September 25, 2009.
- Accepted October 8, 2009.
- American College of Cardiology Foundation