What are the plain x-ray findings of hiatus hernia?
Soft tissue opacity of the chest with or without an air-fluid level, retrocardiac opacity with an air-fluid level, and visceral gas in case of intestinal herniation.
A contrast-filled herniated part of the stomach is seen above the shadow of the diaphragmatic copula. The gastro-esophageal junction is seen above the level of the diaphragm.