Chemical-shift MRI of exogenous lipoid pneumonia

Exogenous lipoid pneumonia results from the aspiration or inhalation of fatty substances, such as mineral oil found in laxatives or nasal medications containing liquid paraffin. We present standard and lipid-sensitive (chemical-shift) MR findings in a patient with histologically confirmed lipoid pneumonia, The loss of signal intensity in an area of airspace disease on opposed-phase imaging was considered specific for the presence of lipid.