Surgical resection successfully treated a rare symptomatic right atrial appendage aneurysm presenting as a pericardial mass.
May support individualized surgical resection for symptomatic right atrial appendage aneurysm; leaves open need for larger series to inform guidelines.
Idiopathic right atrial enlargement is a rare cardiac anomaly presenting as a giant right atrium. A 20-year-old woman presenting for pneumothorax was found to have a pericardial mass compressing right ventricle. Echocardiography and magnetic resonance suggested the diagnosis of lone right atrial appendance enlargement. The mass was surgically removed and histopathology confirmed the diagnosis of right atrial appendance aneurysm. The case is notable for its rarity.
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Corti et al. (2008) studied this question.