Barium swallow in a patient with a hiatus hernia

(A) Normal barium swallow showing the gastroesophageal junction (arrow) is at the level of the diaphragm (arrowhead) and the gastric folds (dashed arrow) are at the same level as the diaphragm.
(B) Barium swallow showing a sliding hiatus hernia (asterisk). The gastroesophageal junction (arrow) is above the diaphragm (arrowhead) and the gastric folds (dashed arrow) are above the diaphragm.
(C) Barium swallow showing a paraesophageal hernia (asterisk). The gastroesophageal junction (arrow) is below the diaphragm (arrowhead).