[Clinical picture and pathomorphology of traumatic high-pressure oil injections, the so called "grease gun injury"].

On the basis of 3 personal observations the clinical picture, pathomorphology and therapy of the so-called "grease gun injury", are described. Clinically there is a difference between the acute stage, intermediary stage and chronic stage. In accordance with the course of disease are the pathomophological alterations, which are characterized by the development of an epithelioidcell-like granulation tissue. The injected oil is surrounded by histiocytic cell infiltrations, which, due to the chemico-toxic influence of this foreign substance are transformed into epithloidcells. Analogous to the pathogenesis of the tuberculoid granuloma this cellular metamorphosis is based on the action of long-chain fatty acids. It is important that the injured person is given immediate surgical treatment and operation. The aim of this being the entire removal of the oil or grease in order to avoid chronically granulating inflammation of the soft parts as well as the formation of scar tissue.