[Patient with pulmonary cysts and diagnosis of co-infection with tuberculosis and hydatidosis. Pediatric cases report].

Numerous entities in the pediatric population can present in the form of cysts or as lesions with similar characteristics. Of the pathologies that can cause these images in children, infectious diseases are the most frequent. We present the case of a native of Bolivia with recent immigration to Argentina who presented a pulmonary co-infection with tuberculosis and hydatidosis. Both infections can present with similar signs and symptoms and although this association is rarely reported in the literature, certain immunological mechanisms could intervene in the causal association of co-infection between helminth parasites and mycobacteria. Both pathologies are very prevalent infections in our region and should be taken into account among the differential diagnoses in patients with cystic or cavitary pulmonary diseases.