A case of cardiac hydatidosis.

We present the case of a female patient with a diagnosis of hydatidosis located in the heart. Although echinococcosis is endemic to our country, very few cases of cardiac hydatidosis are normally reported. In our patient, the hydatid cyst was located in the septum and in the right ventricular cavity; it presented other unusual features, such as the fact that it was located exclusively in the heart, that it first manifested as anaphylactic shock of unknown origin and that it required immediate surgical treatment because of severe haemodynamic compromise.