Infant with respiratory distress Pediatric Imaging Gastrointestinal April 20, 2019July 16, 2019 CXR shows a subtle double density over the left side of the heart in the paraspinal region. Axial CT with contrast of the chest shows a soft tissue mass in the posterior mediastinum on the left. The diagnosis was esophageal duplication. Related Published April 20, 2019July 16, 2019