Abstract
Computed tomography (CT) can establish the diagnosis of lipoid pneumonia in lung masses by detecting fat. The diagnosis of lipoid pneumonia in a patient was 1st suggested by CT, supported by a long history of mineral oil ingestion and confirmed by needle aspiration biopsy of the larger of 2 lung lesions and specific stains. Detection of fat in lung masses by CT will warrant intermittent follow-up by routine chest X-ray. Needle aspiration biopsy or surgery would be needed only if a mass showed signs of growth.

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