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A case of an intrapericardial cyst causing heart failure due to right ventricular compression is presented. Characterization of the lesion and its repercussion on right ventricular function by means of state-of-the-art dual source computed tomography (DSCT) and magnetic resonance imaging (MRI) is shown. The diagnosis of intrapericardial cyst was confirmed after surgical excision and biopsy. Usefulness of these noninvasive techniques for the diagnosis of this rare entity is emphasized.