“…5 On the other hand, in the case of biliary fistulas, which typically affect young people due to the long-term evolution of a hydatid cyst of the hepatic dome, the caustic feature of the bile can induce a chemical erosion of the diaphragm, lung, and pleura. 6,7 The pulmonary parenchyma will be damaged by the caustic action of this bile on the lung and bronchial tree, resulting in conditions ranging from simple hydatid pneumonia to the development of a cave. 6 Generally, it is a multiple or solitary cystic lesion of 1 to 20 cm in diameter.…”