[Immature intrapericardial teratoma: a case report in a newborn].

We report the case of an intrapericardial teratoma, diagnosed at 38 weeks of gestation. Echocardiography revealed a 38 x 39 mm multicystic pedunculated mass compressing the right atrium and the right ventricle, but without symptoms, associated with severe anterior pericardial effusion. Surgical resection of the mass was performed after birth successfully.