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Right paratracheal stripe

The right paratracheal stripe is a normal linear radiographic interface seen on frontal chest radiographs. It represents the interface between air within the trachea and adjacent soft tissues of the right mediastinum, primarily the right paratracheal soft tissues and pleura.

It is an important radiographic landmark used to assess mediastinal anatomy and symmetry on chest X-ray.

Synonyms

  • Right paratracheal line

  • Right tracheomediastinal stripe

Location

  • Seen along the right lateral border of the trachea

  • Extends vertically from the thoracic inlet

  • Usually visible down to the level of the azygos vein or right main bronchus

  • Located in the superior mediastinum

  • Medial to the right upper lung field

Anatomical basis

  • Air column of the trachea (medial component)

  • Right mediastinal soft tissues, including:

    • Paratracheal connective tissue

    • Right paratracheal lymph nodes

    • Mediastinal pleura

  • Thin layer of fat contributing to the air–soft tissue interface

Relations

Medially:

  • Tracheal air column

Laterally:

  • Right upper lobe of the lung

Anteriorly:

  • Superior mediastinal soft tissues

Posteriorly:

  • Paratracheal region and upper thoracic spine

Superiorly:

  • Thoracic inlet

Inferiorly:

  • Azygos vein / right main bronchus level

X-ray appearance

Chest radiograph (PA view):

  • Appearance: Thin, vertical, soft-tissue stripe adjacent to the right side of the trachea

  • Thickness: Usually ≤4 mm in adults

  • Margins: Smooth and sharply defined

  • Extent: Most conspicuous in the upper mediastinum

  • Symmetry: Only normally seen on the right (left side lacks a comparable stripe due to anatomy)

  • Visibility factors: Best seen on well-inflated lungs with optimal exposure

X ray image

Right paratracheal stripe x ray Anatomy, Location and Imaging Appearance CT anatomy image -img-00000-00000