Hydatid Cyst of the Interventricular Septum
A 12-year-old girl was admitted with acute onset dyspnea and palpitation. Echocardiographic examination indicated cardiac tamponade, and emergent pericardial tube drainage was performed. Histopathologic examination of the pericardial materials revealed cuticula-like structures and fluid rich in histiocytic cells and eosinophiles. Postoperative control echocardiography showed cystic structures in the interventricular septum (Figure 1). Further investigation was performed with cardiac magnetic resonance imaging, and a hydatid cyst of the interventricular septum was detected (Figure 2). Parasitic infestation was solely confined to the heart and was not present in the liver, lungs, or brain. During cardiopulmonary bypass and through right ventriculotomy, the cyst was sterilized and evacuated. The wall of the cyst was partially excised (Figure 3), and the cavity was then plicated and closed.
Echinococcosis still remains a serious health problem in the endemic areas of the world.1 Cardiac involvement should be considered in patients with previous hydatid cyst disease2; however, primary involvement of the interventricular septum is very rare.