[Hydatid cyst of the heart].

BACKGROUND: We report an unusual localization of a hydatid cyst: the septum interventriculare. CASE REPORT: A 60-year-old algerian man with hypertension was treated for cardiac insufficiency with hypereosinophilia. Cardiac echography showed a round tumor in the septum interventriculare. Serologic tests for hydatidosis were positive. Computed tomography and magnetic resonance imaging were consistent with the diagnostic of hydatid cyst. Surgical treatment was rejected because of severe underlying hypertensive cardiopathy. DISCUSSION: Cardiac hydatidosis is uncommon, but may be revealed by cyst rupture. Treatment requires surgery and associated medical management with albendazole requires further evaluation.