Hydatid cyst is the cystic space occupying lesion caused by echinococcus .Cystic echinococcosis is a zoonosis caused by larval stage of E. granulosus .Other less common species are vogeli, oligarthrus, multilocularis. In adults cysts are more frequently in liver followed by lungs but in children lung is the predominating site .Pulmonary cystic echinococcosis (CE) is an incapacitating disease frequently found across a wide geographic range. The majority of children and adolescents with lung lesions are asymptomatic despite having lesions of impressive size. Symptoms mostly by mass effect which exerts pressure on the surrounding tissue. Here we document a case of hydatid cyst of lung who presented to our hospital with secondary bacterial pneumonia.

Keywords: Hydatid cyst ,pulmonary cystic echinococcosis, zoonosis.

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