Abstract
Hydatid disease has a wide geographic distribution around the world. In human, the liver is the most commonly affected organ, followed by the lungs. Intrathoracic extrapulmonary locations are generally the mediastinum, pleura, pericardium and chest wall. Pleural involvement usually follows the rupture of a pulmonary or hepatic cyst inside the pleural space causing secondary pleural hydatidosis. We report four cases of patients who were referred to our hospital for management of pleural hydatid disease as a complication of intrapulmonary echinococcosis.