Simple biliary atresia score-a validated diagnostic aid for infantile cholestasis

Area of Science:

• Pediatric Gastroenterology
• Neonatology
• Diagnostic Imaging

Background:

• Infantile cholestasis diagnosis can be delayed due to variable workups.
• Delayed diagnosis of biliary atresia (BA) in infants leads to poorer outcomes.
• A need exists for a practical tool to stratify risk for BA in jaundiced infants.

Purpose of the Study:

• To develop and validate a practical scoring system for risk stratification of infantile cholestasis.
• To identify infants with a high likelihood of biliary atresia (BA).
• To expedite the diagnosis and management of BA in neonates.

Main Methods:

• A score (0-7) was developed using logistic regression from a retrospective cohort (n=58).
• The score incorporates gallbladder length, common bile duct diameter, portal vein echogenicity, direct-to-total bilirubin ratio (D/T), and gamma-glutamyl transferase (GGT).
• The score was validated in a separate cohort (n=28), with final diagnoses confirmed by intraoperative cholangiogram and liver histopathology.

Main Results:

• A cutoff score of ≥3 demonstrated high sensitivity (100% in derivation, 94% in validation) for diagnosing BA.
• The direct-to-total bilirubin ratio (D/T) was the most sensitive parameter (93%), while common bile duct (CBD) diameter was most specific (88%).
• The score accurately predicted non-BA cases in 65% and 63% of infants in the derivation and validation cohorts, respectively.

Conclusions:

• A validated, simple, and sensitive diagnostic score for cholestatic infants is proposed.
• This score aims to facilitate earlier risk stratification and management of biliary atresia (BA).
• The tool can aid clinicians in making timely decisions for infants with suspected BA.