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Figure 10a.  Pulmonary hypoplasia. (a) Anteroposterior radiograph shows opacity of the right hemithorax and a shift of the mediastinal structures to the right, due to pulmonary hypoplasia secondary to right diaphragmatic agenesis. (b) Angiographic MR image of a 10-year-old boy shows a hypoplastic right pulmonary artery (arrows).