Normal junctional lines – detail image

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Normal junctional lines – detail image

  • These normal mediastinal lines are not visible in all normal chest X-rays
  • Knowing what they represent can help avoid confusion
  • The junctional lines are the point of contact of the left and right lungs
  • The right para-tracheal line is the edge of the trachea contrasted against air in the trachea and the adjacent right lung
  • The azygo-oesophageal line marks the medial edge of the azygo-oesophageal recess – the point of contact between the medial edge of the right lung and soft tissue structures of the mediastinum (oesophagus and azygos vessels)
  • Read more about mediastinal contours

Normal vessels

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Normal vessels

  • Overlying vascular structures often makes assessment of hilar regions difficult
  • Hilar vessels can have the appearance of lung nodules
  • Here no ‘nodule’ seen peripheral to the hilar regions
  • (See detail below)

Normal vessels - detail

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Normal vessels - detail

Page author: Salisbury NHS Foundation Trust UK (Read bio)

Last reviewed: October 2019