Bilateral Pulmonary Hydatid Cyst in a Young Child: A Rare Case Report from North India.

Echinococcosis or hydatid disease is caused by the larval stage of the dog tapeworm, that is, Echinococcus granulosus , E. multilocularis , E. vogeli , or E. oligarthrus . Echinococcus granulosus causes cystic echinococcosis, which has a worldwide distribution. Liver is the most common site, affecting approximately two-third of the patients, whereas lung involvement is seen in approximately 25% of cases. This case is a very rare scenario of bilateral pulmonary hydatid cysts in a young child having exposure to a pet dog with negative hydatid serology and normal eosinophil count.