<prompt> Most common location of congenital cyst in lung:Right bronchusLeft bronchusPleural surfacePerihilar intrapulmonary  <response>: Ans. A. Right bronchus Ref: Nelson Textbook of Pediatrics 20thed p2057Explanation Bronchogenic cysts arise from abnormal budding of the tracheal diverticulum of the foregut before the 16th week of gestation and are originally lined with ciliated epithelium. They are more commonly found on the right and near a midline structure trachea, esophagus, carina, but peripheral lower lobe and perihilar intrapulmonary cysts are not infrequent. Cysts are rarely demonstrable at birth. 