Preschooler with respiratory distress Pediatric Imaging Chest December 29, 2023December 6, 2023 CXR AP and lateral shows a large septated cystic lesion filling nearly the entire left hemithorax and causing mass effect with depression of the left hemidiaphragm and mediastinal shift to the right. The diagnosis was congenital pulmonary airway malformation Type I. Related Published December 29, 2023December 6, 2023