Septal cystic mass in the right atrium: echocardiographic evaluation

Right atrial masses rarely are seen in children and are usually benign. Clinical manifestations mainly depend on the location of the mass and whether it alters blood flow. This report describes the clinical course, echocardiographic findings, pathology, and serial follow-up of an unusual cystic mass with a mixture of tissue common to the atrioventricular septum located in the posteroinferior right atrium.