A newly described clinical strategy from Texas Children's Hospital and Baylor College of Medicine aims to shorten the diagnostic delay for biliary atresia (BA), a rare but serious infant liver disease, by pairing direct or conjugated bilirubin measurements with a feeding abdominal ultrasound exam. The approach, detailed in a review published March 16, 2026, in World Journal of Pediatric Surgery (DOI: 10.1136/wjps-2025-001142), could help clinicians identify infants needing urgent evaluation while reducing unnecessary invasive testing.
Biliary atresia, thought to begin before birth when extrahepatic bile ducts do not form properly, leads to bile buildup in the liver, causing progressive injury and increasing the likelihood of liver transplantation. Early treatment with Kasai portoenterostomy (KP) before 30–45 days of life offers the best chance of delaying or avoiding transplant, yet diagnosis often occurs after 60 days due to subtle early signs. Jaundice can resemble common newborn conditions, and pale stools may not appear immediately.
The proposed pathway begins with measuring direct or conjugated bilirubin (DB/Bc) in the newborn nursery and during early outpatient visits. Evidence suggests DB/Bc levels can be elevated within the first 24–48 hours of life in infants with BA, before other clinical signs emerge. Primary care providers are guided to test at 2–4 weeks for persistent jaundice, pale stools, or previous high DB/Bc, consistent with American Academy of Pediatrics guidance.
The second step involves a feeding abdominal ultrasound for infants with high DB/Bc levels. Instead of requiring fasting, the infant feeds before or during imaging, making the duct at the hilum (DaH) easier to visualize. 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, prompting definitive evaluation, while other findings support continued outpatient assessment.
The strategy is designed to make early BA evaluation more actionable for the entire care team, from nursery providers to surgeons. The authors emphasize the aim is not to replace specialist judgment but to provide clearer signals when time matters most. Potential implications include reducing diagnostic delays, addressing disparities by identifying risk before visual signs are missed, and making follow-up less burdensome by avoiding fasting and reducing reliance on tests requiring anesthesia. 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.
