Chest x-ray review: external, foreign material and check areas

Last revised by Liz Silverstone on 25 Sep 2024

Chest x-ray review is a key competency for medical students, junior doctors and other allied health professionals. Using A, B, C, D, E, F is a helpful and systematic method for chest x-ray review where E refers to external (chest wall, base of neck and shoulder girdles) and F refers to expected foreign material such as medical devices, foreign bodies and surgical clips or unexpected items such as gossypibomas. It is not sufficient to report these with the word “stable”. Every foreign item must be identified and assessed to make sure the appearances are satisfactory.

Finally, before concluding your assessment, review important check areas:

  • apices

    • many people forget to look above the clavicles

    • look again at the lung above the clavicles

    • this is a common site for lung cancer and tuberculosis

  • behind the heart

    • altered density in the retrocardiac region can be difficult

    • check for basal consolidation or a mass in this region

    • fluid-level of hiatus hernia

  • below the diaphragm

    • diaphragmatic contour is the dome of the diaphragm

    • the lungs extend posteriorly below the diaphragm

    • look out for mass lesions below the diaphragm

  • soft-tissue abnormalities

    • gas in the soft-tissues (surgical emphysema)

    • look for both breast shadows in female patients​

Imaging differential diagnosis

  • Pneumoperitoneum
  • Left mastectomy
  • Pectus excavatum
  • Hiatus hernia
  • Pancoast tumor
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