[Reye's syndrome].

Reye's syndrome, characterized by acute encephalopathy and fatty degeneration of the viscera with hepatic failure, is a life-threatening illness that affects children of all ages. Although Reye's syndrome has been investigated extensively, its etiology and pathogenesis remain obscure. Metabolic pathophysiology appears to include a process affecting liver mitochondria. Recently disturbances in fatty acid oxidation have been described with a similar clinical picture. The cause of these events is presumably related to triggering viral illnesses, in ways that are unclear. Since prompt treatment might provide a better chance for recovery, early diagnosis is important.