Chronic aspiration pneumonia

Chronic aspiration pneumonia is a form of aspiration pneumonia according time of onset. This can include changes caused by microaspiration or macroaspiration of oro-gastric content through time.

This results from repeated passage of food material, gastro-oesophageal reflux content and/or saliva into the sub-glottic airways and then into the lungs over a prolonged region of time.

CT/HRCT chest
Direct features

Findings can vary dependent on the duration and amount of content and involves mainly dependent lung regions although at times can have a random distribution.

While each feature on its own can be non specific, aspiration changes can include a combination of

Indirect features

There may be a predisposing factor for aspiration such as hiatus hernia, features supportive reflux or a stroke in clinical history or other imaging.

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Article Information

rID: 37245
System: Chest
Synonyms or Alternate Spellings:
  • Chronic aspiration pneumonitis
  • Chronic aspiration pneumonias
  • Chronic pulmonary aspiration
  • Chronic pulmonary aspiration (CPA)
  • Recurrent aspiration pneumonia

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