MSFinals-4540
A 10-day old infant is brought to the emergency department by his mother due to poor feeding and drinking for the past 48 hours. The mother is concerned about the baby’s weight gain and has noticed pale stools. During the examination, the baby appears jaundiced and has an enlarged liver. The medical team performs a newborn jaundice screen and considers biliary atresia as a possible diagnosis. What clinical finding would be most indicative of biliary atresia?