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Apical zone

The apical zone (a.k.a. lung apex) is one of the four chest radiograph zones and an important location for missed diagnoses when reporting a frontal chest radiograph and makes up one of the "check areas". It is sometimes thought of as a subdivision of the upper zone

Radiographic features

Plain radiograph
  • portion of the lungs that lie above the inferior margin of the clavicles on a frontal chest radiograph (see Figure 1) 2

Related pathology

The apices and upper zones are preferentially affected by pathology that is related to inhalation. The upper portion of the lungs have a positive ventilation mismatch when compared to the bases, where there is preferential perfusion. Common conditions involving the apical zone include:

Chest

Article information

rID: 13649
System: Chest
Section: Approach
Tag: cases, cases
Synonyms or Alternate Spellings:
  • Apices of lungs
  • Apex of lung
  • Apex of the lung
  • Lung apex
  • Lung apices
  • Apices
  • Apical zones
  • Apical region
  • Apical regions

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Cases and figures

  • Figure 1: apical zone highlighted
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  • Case 1: normal chest x-ray
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