Abstract: Objective: To discuss the value of CT in the diagnosis of bronchogenic cysts. Methods: CT images in 13 histopathologically proved cases of bronchogenic cysts were retrospectively reviewed. Results: There were 3 mediastinal bronchogenic cysts. 1 cyst was of water of attenuation, 2 cysts were of soft-tissue attenuation and cyst contents do not enhance following administration of contrast material. There were 10 pulmonary bronchogenic cysts. 2 cysts was of air-water of attenuation and 3 cysts were of water of attenuation, were sharply marginated with smooth borders. 5 cysts were of soft-tissue attenuation, 1 was associated with same lobar sequestration, 1 was marginated with round calcification, and 3 were fuzzy marginated with irregular borders. Conclusion: We believe that a confident diagnosis of bronchogenic cyst could be done with CT in water and air-water attenuation cysts, soft-tissue cysts can be confused with other lesions, enhancemen CT could help the diagnosis of high attenuation cysts.