The bronchogenic cyst, one of rare congenital cystic disease, was reported occasionally since the first description of Bartholinus in 1678. The increased use of roentgenograms of the thorax and the widening scope of thoracic surgery was made, and much more cases of bronchogenic cysts has been observed. The most common location of a mediastinal bronchogenic cyst was the hilum. The treatment for bronchogenic cyst is surgical resection. Forty eight cases of bronchogenic cysts which were pathologically confirmed, are reported and the related literatures are reviewed.