Among the different etiologies of noncardiogenic acute pulmonary edema is found the administration or ingestion of various substances. We have studied two patients with ARDS secondary to the ingestion of toxic oil. Both patients presented similar roentgenographic findings characterized by interstitial and alveolar infiltration in "butterfly" distribution, pleural effusion, and a normal cardiac silhouette. The two cases also showed a pulmonary compliance either normal or slightly diminished. With the aid of artificial ventilation, they evolved favorably, gaseous exchange and chest x-ray films returning to normal 16 and 22 days after admission.