The azygoesophageal recess is the region inferior to the level of the azygos vein arch in which the right lung forms an interface with the mediastinum between the heart anteriorly and vertebral column posteriorly.
It is bordered on the left by the esophagus.
Deviation of the azygoesophageal line is caused by (5):
Hiatal hernia
Esophageal disease
Left atrial enlargement
Subcarinal lymphadenopathy
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