[Exogenous lipid pneumonia--a report of four cases].

Exogenous lipoid pneumonia (ELP) is a rare interstitial pulmonary disease caused by aspiration of the oily material. It is known to mimic many pulmonary diseases and causes many diagnostic difficulties. We present four patients with ELP. The clinical picture was very heterogenous. We described these cases to show that the use of the mineral oils may increase the risk of lipoid pnemonia.