A research team from Texas Children's Hospital and Baylor College of Medicine, in collaboration with Stanford University School of Medicine, has published a review in the World Journal of Pediatric Surgery detailing a practical pathway designed to accelerate the diagnosis of biliary atresia (BA), a rare but serious liver disease in newborns. The approach pairs direct or conjugated bilirubin (DB/Bc) measurements with a feeding abdominal ultrasound exam, aiming to identify infants who need urgent evaluation while minimizing unnecessary invasive procedures.
Biliary atresia occurs when the bile ducts outside the liver are blocked or absent, leading to bile accumulation and progressive liver damage. Early treatment with Kasai portoenterostomy (KP), ideally before 30–45 days of life, offers the best chance of delaying or avoiding liver transplantation. However, many infants are diagnosed after 60 days, as early jaundice can mimic common newborn conditions and pale stools may not appear immediately. The newly described strategy seeks to shorten this diagnostic delay through two practical steps.
The first step involves DB/Bc measurements in the newborn nursery and during early outpatient visits. According to the review, DB/Bc levels can be elevated within the first 24–48 hours of life in infants with BA, even before other clinical signs emerge. Primary care providers are encouraged to test DB/Bc levels at 2–4 weeks for infants with persistent jaundice, pale stools, or a previous high result, in line with American Academy of Pediatrics guidelines.
The second step is a feeding abdominal ultrasound exam for infants with elevated DB/Bc levels. Unlike traditional fasting ultrasounds, the infant feeds before or during imaging, which may improve visualization of the duct at the hilum (DaH). The exam also measures maximum echogenicity (MxE) near the right portal vein. An MxE greater than 4.0 mm or an absent DaH raises concern for BA and may prompt definitive evaluation, while other findings support continued outpatient monitoring.
The authors emphasize that the pathway is designed to make early BA evaluation more actionable for the entire care team, including nursery providers, primary care physicians, radiologists, hepatologists, and surgeons. The goal is not to replace specialist judgment but to provide clearer signals when time is critical. By sharing the pathway, the researchers hope other centers will provide feedback, test the approach in diverse settings, and adapt useful components into their own workflows.
The potential implications of this strategy are broad. Universal newborn DB/Bc screening could reduce diagnostic delays and may help address disparities in diagnosis by identifying risk before visual signs are missed or misread. The feeding ultrasound approach could make follow-up evaluation less burdensome by avoiding fasting and potentially reducing reliance on tests that require anesthesia or invasive procedures. For families, earlier detection could mean faster treatment decisions and a better chance of preserving the native liver.
Future studies will need to evaluate implementation, cost-effectiveness, and performance across multiple centers and healthcare systems. The review, published in the World Journal of Pediatric Surgery, was supported by funding from the NIH National Institute of Diabetes and Digestive and Kidney Diseases, the American Association for the Study of Liver Diseases, the American Liver Foundation, and Biliary Atresia Research and Education, Inc, among others.
