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A case with right atrial appendage aneurysm and hydrops foetalis

Right atrial appendage aneurysm is a very rare malformation that may be congenital or acquired (Gulati et al. 2011). Congenital-type atrial appendage aneurysms are thought to develop due to dysplasia of muscular structure in the atrium wall, while the acquired type generally develops as a post-traumatic lesion (Tejero-Hernandez et al. 2012). Although it may be diagnosed during the neonatal period, most cases are diagnosed in the third or fourth decades of life. Right atrial appendage aneurysm can be asymptomatic or can cause supraventricular arrhythmia and thromboembolic events (Ishii et al. 2012). This study presents a patient with a right atrial appendage aneurysm diagnosed via foetal echocardiography that was referred due to hydrops foetalis at the 20th week of gestation.