Exogenous lipid pneumonia is the result of chronic inhalation of oily substances and is primarily a disease that affects the alveolar spaces. On CT, diffuse ground-glass opacities and consolidations, sometimes with fat attenuation caused by large lipid particles and numerous lipid-laden macrophages distending the alveolar spaces, can be seen, especially in the lower lung areas (Fig. 7c) [9, 12, 13] .