[Fulminant and subfulminant hepatitis: causes and treatment]

Fulminant hepatitis is an emergency because within a few hours, the physician must find the cause of the hepatitis (not identified in 15 to 20% of cases), rule out any contraindication to liver transplantation, verify that it is indicated, and prevent and/or treat the complications associated with liver failure. Viruses (especially hepatitis viruses A and B), drugs, and toxic agents are the most common causes of fulminant hepatitis, with the proportions varying between countries. Hepatitis viruses, the leading cause through 1995-1996, have fallen behind drugs and in particular paracetamol, which is now the leading cause of this disease in Europe and in the United States. There are also other rarer causes: other viruses (e.g., herpes virus HSV1 or 2, hepatitis virus E, parvovirus B19, and chickenpox-herpes zoster), Wilson Disease, acute Budd-Chiari and Reyes syndromes, autoimmune hepatitis, neoplastic infiltration of the liver, hypoxic hepatitis, heatstroke, acute pregnancy-related steatosis, and the HELLP syndrome. Prognosis is essentially determined by neurological status, but is also affected very rapidly by damage to other organs. Liver transplantation has revolutionized the prognosis of fulminant hepatitis, causing survival to increase from 10-20% (all causes combined) to 75-80% at 1 year and 70% at 5 years. These patients can be treated only in specialized centers with access to liver transplantation and to different modern means of liver resuscitation (hypothermia, artificial liver support, albumin dialysis, monitoring intracranial pressure and cerebral perfusion, etc.) -all from the onset of the disease.