Abstract
A fatal case of lipid pneumonia is described, due to inhalation of liquid paraffin, in an infant who had had a congenital esophageal atresia repaired. As the certain identification of this oil is not possible by histological or histochemical means, the material was extracted and purified, and its refractive index and infrared spectrum determined[long dash]these showed it to be liquid paraffin. The published reports are reviewed briefly, and it is clear that the administration of liquid paraffin to infants, particularly those with feeding difficulty, is potentially dangerous.

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