Azygo-esophageal Line aka Azygo-esophageal Stripe

The azygoesophageal line is an
- anatomical landmark representing
  the
  - interface between the azygos vein and the esophagus,
- typically located at the T5 to T6 vertebral levels.
- It serves as a
  - critical
    reference point when assessing the posterior mediastinum and
  - identifying surrounding structures.
- The azygos vein, which runs
  along the right side of the thoracic spine
  - drains blood from the thoracic wall and upper lumbar regions into the superior vena cava, while
- the esophagus lies
  - anterior to the aorta and posterior to the
    trachea.
- Abnormalities in the azygo-esophageal line can indicate
  pathological conditions such as
  - mediastinal masses (tumors or
    lymphadenopathy),
  - esophageal varices,
  - strictures, or anomalies of the azygos vein.