Figure 2b. Pulmonary sequestration with an associated suspected gastric duplication in an asymptomatic male neonate. (a) Coronal multiplanar reformatted image shows an aberrant artery (arrowhead) that arises from the descending thoracic aorta and supplies a mass in the left lung base. An adjacent infradiaphragmatic cystic mass is also noted (C). (b) On an axial image obtained at the level of the gastric fundus, the cystic mass (C) is seen to project into the stomach, a finding that is compatible with gastric duplication.