Acute exogenous lipoid pneumonia

Last revised by David Carroll on 16 Apr 2023

Acute exogenous lipoid pneumonia is an uncommon form of exogenous lipoid pneumonia and is typically caused by the aerosolization and aspiration of a highly viscous hydrocarbon, such as vegetable oil, mineral oil or petroleum jelly 5. The more common pulmonary toxicity exerted by hydrocarbons is an aspiration pneumonitis, typically those of low viscosity and high volatility, and may be a sequela of either aspiration or ingestion.

Radiographic features

Chest radiograph

Non-specific but may show areas of consolidation and with a lower lobe involvement in a majority of patients 2.


Non specific but may show areas of

  • consolidation (considered most common finding) which may have a bilateral lower lobes predilection, followed by the right lower lobe, the right middle lobe, the left lower lobe, and the lingular involvement.

Other described changes include

Occasionally pleural effusions and cystic changes have been described 3.

See also

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