Pattern of diagnostic evaluation for the causes of pediatric acute liver failure: an opportunity for quality improvement
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Published on: August 29, 2025
Michael R Narkewicz1, Dominic Dell Olio, Saul J Karpen
1Department of Pediatrics, Section of Pediatric Gastroenterology, Hepatology and Nutrition, University of Colorado Denver School of Medicine and the Pediatric Liver Center, The Children's Hospital, Aurora, CO, USA.
Insights
Diagnostic testing for metabolic and autoimmune causes of pediatric acute liver failure (PALF) is infrequent in indeterminate cases. Improving these investigations could enhance diagnosis and treatment for children with PALF.
Area of Science:
- Pediatric Hepatology
- Acute Liver Failure Research
- Diagnostic Testing Strategies
Background:
- Pediatric acute liver failure (PALF) presents a diagnostic challenge, particularly when the etiology remains indeterminate.
- Timely and accurate diagnosis is crucial for effective management and treatment of PALF.
Purpose of the Study:
- To assess the frequency of diagnostic testing for common PALF causes (drugs, metabolic, autoimmune, infections) in indeterminate cases.
- Identify gaps in current diagnostic practices for indeterminate PALF.
Main Methods:
- Analysis of the PALF Study Group Database.
- Retrospective review of diagnostic test utilization for 703 PALF patients, focusing on 329 with indeterminate diagnoses.
- Categorization of tests by etiology: drug-related, metabolic, autoimmune, and infectious.
Main Results:
- In indeterminate PALF, drug history was obtained in 99%, but urine toxicology and acetaminophen levels were tested in only 36% and 38% respectively.
- Metabolic disease testing was absent in 54% of patients.
- Autoimmune antibody testing (ANA, ASMA, LKM) was performed in 63-73% of patients.
- Infectious disease testing (HAV, HBV, EBV) was conducted in 68-86% of patients.
Conclusions:
- Diagnostic workup for metabolic and autoimmune etiologies in indeterminate PALF is currently infrequent.
- There is a significant opportunity to improve diagnostic yield and subsequent treatment strategies for children with PALF.
Objective:
To describe the frequency of diagnostic testing for the 4 most common causes of pediatric acute liver failure (PALF) (drugs, metabolic disease, autoimmune process, and infections) in indeterminate PALF within the PALF Study Group Database.
Study Design:
PALF was defined by severe hepatic dysfunction within 8 weeks of onset of illness, with no known underlying chronic liver disease in patients from birth through 17 years of age.
Results:
Of the 703 patients in the database, 329 (47%) had indeterminate PALF. In this group, a drug history was obtained in 325 (99%) urine toxicology screenings performed in 118 (36%) and acetaminophen level measured in 124 (38%) patients. No testing for common metabolic diseases was done in 179 (54%) patients. Anti-nuclear antibody, anti-smooth muscle antibody, and anti-liver kidney microsomal autoantibodies associated with autoimmunity were determined in 239 (73%), 233 (71%), and 208 (63%) patients, and no tests were obtained in 70 (21%). Testing was performed for hepatitis A virus, hepatitis B virus, and Epstein Barr virus in 80%, 86%, and 68%, respectively.
Conclusions:
Current practice indicates that investigation for metabolic and autoimmune causes of PALF are infrequent in patients ultimately given a diagnosis of indeterminate acute liver failure. This offers an opportunity to improve diagnosis and potential treatment options in children with acute liver failure.
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