[Histological study of livers conserved for long periods (author's transl)]

33 pig livers were preserved using two comparative methods: extra-corporeal perfusion and immersion in hypothermia. The duration of conservation varied between 2 and 24 hours. A macroscopic and microscopic study carried out in all cases permitted us to define four cytological stages for the lesions, completed by an ultrastructural study showing the cyto-pathological course of the hepatocytes in two distinct cell series. The interest of this study is to better appreciate the degree of aggression of the lobule in relation to the metabolic gradient and that of the hepatic parenchyma. Analysis of the results is in favour of conservation of the liver by immersion.