Among the main causes of acute liver failure (ALF) in children, metabo
lic diseases (especially in infants), viral and toxin or drug induced
hepatitis are the most frequent. The cause remains, however, undetermi
ned in about 30% of the cases. Management must be conducted in a pedia
tric hepatology unit or intensive care unit in relation with a pediatr
ic transplant team in order: 1) to perform urgent etological diagnosis
; 2) to initiate specific therapy and symptomatic treatment; 3) to eva
luate to severity and prognosis of liver disease for selection of chil
dren for emergency liver transplantation; 4) to evaluate contraindicat
ions to liver transplantation. The overall survival of post-emergency
liver transplantation for ALF in children averages 65%.