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Fig. 2A. —Congenital unilateral pulmonary vein atresia in 43-year-old woman with dyspnea and hemoptysis. Contrast-enhanced CT scan (mediastinal window settings) shows smooth left atrial wall at expected location of right inferior pulmonary vein (small arrows). Confluent mediastinal soft tissue extends anteriorly from azygoesophageal recess to surround, but not narrow, right middle lobe bronchus (large arrow).