Hydropneumothorax secondary to hydatid lung disease.

A case of pulmonary hydatid disease which ruptured to produce a hydropneumothorax is reported. Radiologically the patient presented with an oval opacity which enlarged with an appearance of air crescent. Diagnosis was established by cytological examination of aspirated pleural fluid and an histopathological examination of tissue found in the drainage tube. The patient was managed conservatively with intercostal drainage, albendazole therapy and other supportive measures.