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Published on: August 23, 2022
Biliary atresia
Jane L Hartley1, Mark Davenport, Deirdre A Kelly
1Liver Unit, Birmingham Children's Hospital NHS Trust, Birmingham, UK. jane.hartley@bch.nhs.uk
Insights
Biliary atresia, a rare infant liver disease, now has effective treatments. Early diagnosis and Kasai portoenterostomy surgery improve outcomes, with many children reaching adolescence without liver transplants.
Area of Science:
- Pediatric Gastroenterology and Hepatology
- Infant Disease Research
- Surgical Innovation in Hepatobiliary Conditions
Background:
- Biliary atresia is a rare, potentially fatal infantile liver disease.
- Significant advancements have transformed it into a manageable condition with surgical and transplant options.
- Early diagnosis and intervention are crucial for favorable infant outcomes.
Purpose of the Study:
- To summarize current understanding and management of biliary atresia.
- To highlight the importance of early detection and surgical intervention.
- To identify knowledge gaps and research directions in biliary atresia pathogenesis.
Main Methods:
- Review of historical and current treatment outcomes for biliary atresia.
- Analysis of factors influencing success rates of Kasai portoenterostomy.
- Exploration of proposed pathogenetic mechanisms, including genetic and immune factors.
Main Results:
- Early referral and timely Kasai portoenterostomy improve outcomes in infants with persistent jaundice.
- Up to 60% of children achieve successful biliary drainage post-Kasai portoenterostomy.
- Approximately 80% of those with successful drainage reach adolescence with good quality of life, avoiding liver transplantation.
Conclusions:
- Biliary atresia management has evolved, offering better prognoses through early surgical intervention.
- While management is improving, the underlying pathogenesis remains poorly understood, likely multifactorial.
- Future research focuses on identifying genetic, immune, and fibrotic factors to prevent cirrhosis and reduce the need for liver transplantation.
Abstract:
Biliary atresia is a rare disease of infancy, which has changed within 30 years from being fatal to being a disorder for which effective palliative surgery or curative liver transplantation, or both, are available. Good outcomes for infants depend on early referral and timely Kasai portoenterostomy, and thus a high index of suspicion is needed for investigation of infants with persistent jaundice. In centres with much experience of treating this disorder, up to 60% of children will achieve biliary drainage after Kasai portoenterostomy and will have serum bilirubin within the normal range within 6 months. 80% of children who attain satisfactory biliary drainage will reach adolescence with a good quality of life without undergoing liver transplantation. Although much is known about management of biliary atresia, many aspects are poorly understood, including its pathogenesis. Several hypotheses exist, implicating genetic predisposition and dysregulation of immunity, but the cause is probably multifactorial, with obliterative extrahepatic cholangiopathy as the common endpoint. Researchers are focused on identification of relevant genetic and immune factors and understanding serum and hepatic factors that drive liver fibrosis after Kasai portoenterostomy. These factors might become therapeutic targets to halt the inevitable development of cirrhosis and need for liver transplantation.
