Teenager with an incidentally noted paraspinal mass on a CXR

Upper GI of organoaxial gastric volvulus and hiatal hernia
Early AP (above left) and later AP (above right) and lateral (below) images from an upper GI shows rotation of the stomach along its long axis with reversal of the greater and lesser curvatures of the stomach. The stomach is also noted to have slid through the esophageal hiatus into the chest.

The diagnosis was organoaxial gastric volvulus in a patient with a hiatal hernia.