Nonviral or Drug-Induced Etiologies of Acute Liver Failure.

Acute liver failure (ALF) is a rare but highly fatal condition. The most common causes include drug-induced and viral hepatitis, but other less common etiologies, especially autoimmune hepatitis, Budd-Chiari syndrome, and Wilson disease, need to be considered. Because diagnosis is frequently tied to potential for reversibility of ALF and prognosis, early identification in a timely manner is crucial. Other causes of ALF are more easily recognizable based on specific circumstances, such as ALF in pregnancy or ischemic hepatitis. Ultimately, maintaining a wide differential diagnosis in patients with ALF is essential to identifying the proper treatment and prognosis.