[Liver changes suggesting alpha-1-antitrypsin deficiency (a neglected disease)]

Area of Science:

• Hepatology
• Genetics
• Pediatric Gastroenterology

Context:

• Liver needle biopsies are essential for diagnosing pediatric liver diseases.
• Alpha-1-antitrypsin (AAT) deficiency is a genetic disorder that can manifest with liver disease in infants and children.
• Histopathological findings in liver biopsies can suggest underlying genetic conditions.

Purpose:

• To investigate the prevalence and histological features of alpha-1-antitrypsin (AAT) deficiency in pediatric liver disease.
• To evaluate the utility of liver biopsy findings in identifying potential AAT deficiency cases.
• To recommend screening for AAT deficiency in specific pediatric patient groups.

Summary:

• Of 85 pediatric patients with liver disease, three showed histological changes consistent with severe alpha-1-antitrypsin (AAT) deficiency.
• While characteristic globules were rare, AAT positivity in periportal hepatocytes was observed in all three pediatric cases.
• Eight adult cirrhosis patients also had suggestive AAT globules, though serum AAT levels were unknown.
• The study highlights the importance of considering AAT deficiency in children with neonatal liver disease and adults with cryptogenic cirrhosis.

Impact:

• Early identification of AAT deficiency in children can lead to timely intervention and management, potentially altering disease progression.
• This study emphasizes the role of liver biopsy interpretation in diagnosing genetic liver disorders.
• Recommendations for AAT deficiency screening can improve diagnostic yield in pediatric and adult liver disease of uncertain etiology.