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a Chest radiograph of an 8-year-old boy showing the air-fluid level in the left hemithorax. It was misdiagnosed as hydropneumothorax and a chest tube was inserted. b Reformatted coronal CT image of the same patient showing the left-sided hydropneumothorax and a well-defined thick-walled cystic structure. This proved to be diaphragmatic hernia at surgery
