What are the age‑specific causes of acute liver failure?

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Age-Specific Causes of Acute Liver Failure

The causes of acute liver failure vary dramatically by age, with metabolic disorders and infections dominating in neonates, viral hepatitis and metabolic diseases in infants and young children, and acetaminophen toxicity, viral hepatitis, and autoimmune hepatitis in older children and adolescents.

Neonatal Period (0-30 days of life)

In the first month of life, the etiology spectrum is distinct and carries particularly poor prognosis 1, 2:

  • Viral infections (23%) - Present with markedly elevated ALT (median 1179 IU/L) and extremely poor survival (median 17 days) 1
  • Gestational alloimmune liver disease with neonatal hemochromatosis (GALD-NH) (21%) - Characterized by paradoxically low ALT (median 23 IU/L) and median survival of 74 days 1
  • Cardiac-associated ischemia (16%) - Related to congenital heart disease or perinatal hypoxic events 1
  • Other ischemic causes (14%) 1
  • Genetic/metabolic etiologies (9%) 1
  • Trisomy 21-associated myelodysplasia (TAM) (7%) 1
  • Hemophagocytic lymphohistiocytosis (HLH) (2%) - Most cases (80%) occur within the first year, with familial HLH reported as early as the first days of life 3

Critical diagnostic distinction: Neonatal hemochromatosis is the leading cause of liver failure in neonates and presents with hepatic failure within the first few days of life 4. Alpha-fetoprotein (AFP) levels at presentation significantly predict survival with native liver (p=0.04) 1.

Infants (<1 year of age)

The etiology shifts toward metabolic disorders and infections 2, 5:

  • Metabolic liver diseases (33% in specialized centers, 17.2% in developed countries) - Including:

    • Hereditary tyrosinemia type 1 (presents at few months of age with cirrhosis and HCC common at diagnosis) 4
    • Glycogen storage diseases 4
    • Niemann-Pick disease type C (presents with cholestasis, hepatosplenomegaly, and acute liver failure) 3
    • Wilson's disease (rare in this age group) 6

  • Hemophagocytic lymphohistiocytosis (17%) - 80% of familial HLH cases occur within the first year 3

  • Unspecified infections (39.3% in developing countries) 2

  • Alpha-1 antitrypsin deficiency - 11% present with neonatal cholestasis, 6% with other clinical liver disease symptoms 7

Key clinical indicators for metabolic disease in infants 5:

  • Suggestive family history (OR 3.73)
  • Developmental delay (OR 4.4)
  • Presence of diarrhea/vomiting (OR 3.28)
  • Urinary non-glucose reducing substance (OR 15.5)
  • Young age, high bilirubin, low blood sugar
  • Jaundice-to-encephalopathy interval differs significantly from non-metabolic causes (p=0.039)

Young Children (1-3 years)

The spectrum broadens to include more infectious and toxic causes 5, 8:

  • Metabolic liver diseases - Remain significant but decrease in proportion
  • Hemophagocytic lymphohistiocytosis - Continues as important cause
  • Drug-induced liver injury - Emerges as common etiology
  • Acute viral hepatitis A - Becomes more prominent
  • Hepatitis A (32.4% in developing countries for children >1 year) 2

Older Children and Adolescents (>3 years to adolescence)

The etiology pattern resembles adult causes more closely 9, 2, 8:

In Developed Countries:

  • Acetaminophen toxicity (9.24%) - Leading cause overall 2
  • Non-A-B-C Hepatitis (8.18%) - For children >1 year 2
  • Drug-induced liver injury - Including minocycline, nitrofurantoin, infliximab 10
  • Autoimmune hepatitis - Presents in ~40% as acute hepatitis with jaundice and markedly elevated AST (several thousands); 30% have cirrhosis at presentation 10, 9
  • Wilson's disease - Should be suspected in any patient presenting with:
    • Coombs-negative hemolytic anemia with acute intravascular hemolysis
    • Coagulopathy unresponsive to vitamin K
    • Modest ALT rises (typically <2000 IU/L)
    • Markedly subnormal alkaline phosphatase (typically <40 IU/L)
    • Alkaline phosphatase to bilirubin ratio <2
    • Female:male ratio 2:1 6

In Developing Countries:

  • Hepatitis A (28.9% overall, 32.4% in children >1 year) - Dominant cause 2
  • Hepatitis E - Particularly in endemic regions
  • Hepatitis B - Especially in Asia-Pacific regions 11
  • Herbal/traditional medicine toxicity 12

Geographic Considerations

The developmental status of the country fundamentally alters the differential diagnosis 2, 12:

  • High-income countries: Acetaminophen and drug-induced liver injury predominate
  • Low-middle-income countries: Viral hepatitis (particularly HAV and HEV) and herbal/traditional medicine-related ALF are more common

Indeterminate Etiology

Approximately 10-25% of cases remain indeterminate despite extensive investigation across all age groups 9, 5. When etiology cannot be determined after routine evaluation, liver biopsy using a transjugular approach should be considered 9.

Critical Age-Related Prognostic Factors

Overall survival with native liver is only 33% in neonates and 40% in infants 1, 5, emphasizing the need for early transfer to transplant centers. The etiology significantly impacts transplant-free survival: acetaminophen, hepatitis A, hypoxic hepatitis, and pregnancy-related ALF have 50% transplant-free survival, while hepatitis B, non-acetaminophen drugs, autoimmune hepatitis, Wilson's disease, and Budd-Chiari syndrome have <25% transplant-free survival 13.

References

2
Research

Differential Diagnosis of Acute Liver Failure in Children: A Systematic Review.

Pediatric gastroenterology, hepatology & nutrition, 2020

8
Research

Acute liver failure in children and adolescents.

Clinics and research in hepatology and gastroenterology, 2012

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