<prompt> Bronchogenic cysts occurs commonly in-Post mediastinumSup.mediastinumCarinaPeriphery of lung  <response>: Ans. is c i.e., Carina Bronchogenic cysts o Bronchogenic cyst is a congenital lung defect, which develops from abnormal lung budding of primitive foregut. o Most of the bronchogenic cyst arise in the mediastinum, where they are usually located in the mid mediastinum near carina. o About 15 of Bronchogenic cyst also occurs in pulmonary parenchyma. o When located in the lung they are more common in right lung and lower lobe. o They are lined by cuboidal or ciliated columnar epithelial cells and are usually filled with mucoid material. 