A rarely seen mass in atrioventricular sulcus: Cardiac hydatid cyst

Hydatid cyst is a parasitic disease caused by Echinococcus granulosus that affects people by accidentally ingesting embryonated eggs (1). Hydatid cysts are usually located in liver followed by lung, muscle and other organs. However cardiac involvement occurs only 0.5-2% of patients infestated with hydatid cyst. Cardiac hydatid cyst is often located in left ventricle followed by right ventricle, left atrium, pericardium, pulmonary artery (2). Herein we report a hydatid cyst in atrioventricular (AV) sulcus, an unusual and rare location for cardiac hydatid cyst, demonstrated by three dimensional transthoracic and cardiac magnetic resonance imaging.