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Prominent pulmonary artery

Authoring team

This is seen as an enlarged second convex shadow on the left-hand side of the PA chest X-ray (first concave shadow is the aortic knuckle, second is the pulmonary artery, third is the left atrial appendage, and fourth is the left ventricle).

Causes include:

  • pulmonary artery hypertension - the various causes are to be found in the section of the system on pulmonary arterial hypertension.
  • spurious causes:
    • rotated film
    • pulmonary artery displaced by a large aortic root
    • pulmonary artery displaced by a mediastinal mass
    • a chest X-ray of a corrected transposition

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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