Interstitial lipoid pneumonia-A complication of intravenous administration of lipid emulsions in critically ill patients.

Lipoid pneumonia is a rare entity most often associated with inhalation of foreign material (i.e. "fire-eater's lung"), silicone injection, and severe trauma. We present the case of a 61-year old man who developed acute respiratory distress syndrome following endoscopic retrograde cholangiopancreatography (ERCP) for cholelithiasis. Intensive care supportive therapy included mechanical ventilation, dialysis, and total parenteral nutrition. Unresolved pneumothorax necessitated lobectomy. Histology of the lobectomy specimen demonstrated massive intra-alveolar haemorrhage and numerous alveolar septal macrophages with clear cytoplasmic vacuoles. These findings were diagnostic of interstitial lipoid pneumonia due to intravenous administration of lipid emulsions. The differential diagnosis is also discussed. Although rare, interstitial lipoid pneumonia should be considered in critically ill patients presenting with an interstitial pattern of lung disease after intravenous administration of lipid emulsions.