Posterior junction line

Dr Daniel J Bell and Dr Henry Knipe et al.

The posterior junction (or junctional) line is formed by the apposition of the pleural surfaces of the posteromedial surfaces of the upper lobes of the lungs, posteriorly to the oesophagus but anterior to the thoracic spine (usually T3-T5) 1,2.

There are many causes for an abnormal appearance of this line 1,2:

  • posterior mediastinum masses
  • retrosternal goitre
  • hyperinflation or collapse of one lung can cause lateral displacement

Radiographic features

Plain radiograph
Chest x-ray
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Article information

rID: 23462
System: Chest
Section: Anatomy
Synonyms or Alternate Spellings:
  • Posterior junctional line

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Cases and figures

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    Figure 1: red line represent posterior junctional line Case 1 - red line represent posterior junctional line
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    Figure 2: posterior junction line
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