Infant with an echogenic right lung mass on prenatal US Pediatric Imaging Chest March 11, 2023February 8, 2023 Axial (above) and coronal (below) CT with contrast of the chest show a round mass in the right superior hilum that consists primarily of fluid density with a small air bubble in it superiorly. The diagnosis was congenital pulmonary airway malformation. Related Published March 11, 2023February 8, 2023