Azygo-oesophageal recess deviation

The azygoesophageal recess (AER) is formed by the interface between the right lung and the mediastinal reflection of the azygos vein oesphagus. The line has a variable appearance:

  • in its upper third, it deviates to the right, where it may either be straight or concave relative to the right lung. In children and young adults, it can be convex relative to the right lung 1
  • in its middle third, the AER is usually straight, but may be slightly convex relative to the right lung near the right pulmonary veins.
  • Finally, in its lower third, the line is usually straight 1

The AER may be deviated by conditions that affect the middle or posterior mediastinal compartments 2:

Chest x-ray
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Article Information

rID: 1217
System: Chest
Synonyms or Alternate Spellings:
  • Deviation of the azygoesophageal recess line
  • Deviation of the azygosesophageal recess line

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