Congenital bronchopulmonary cyst

Congenital bronchopulmonary cyst refers to a congenital cyst that contains bronchial tissue as the cyst wall and contains mucus or gas. It was once called congenital cystic bronchiectasis or congenital bronchogenic cyst. At present, congenital bronchopulmonary cysts are the most active period of tracheal development during the development of lung embryos during 26 to 40 days. Small lung parenchymal cells at the distal end of the lung buds detach from it and develop ectopically, but Unlike lung isolation, it has no further development, so it can be considered that bronchial cysts, lung isolation (including intralobar and external shape), and congenital cystic bronchiectasis are in a category of similar etiology and pathological basis. Similar to lung isolation, the timing of the appearance of the abnormal germ determines its location. Abnormal development occurs earlier. When the lung germ is still developing near the air duct, the cyst is located in the mediastinum or hilum, which is called a bronchial cyst. However, if the abnormal development occurs later, the abnormal germ stays in the lung and the cyst is mostly in the lung. It is called a pulmonary cyst.