Pericardial hydatid cyst presenting with cardiac tamponade.

Cases of cardiac hydatid cyst disease are uncommon, occurring in approximately 0.5% to 2% of patients with hydatid disease. Most cardiac hydatid cysts are located in the left ventricle and interventricular septum. Cardiac involvement may have serious consequences. Both the disease and its surgical treatment carry a high complication rate, including rupture leading to cardiac tamponade, anaphylaxis and also death. In the present report, a 10-year-old girl with cardiac tamponade secondary to a pericardial hydatid cyst is described.