Abstract
For early diagnosis of biliary atresia, revaluation of serum direct bilirubin was reported. Direct bilirubin level of neonatal jaundice and biliary atresia suspected in the neonatal period was measured. There was significant difference between two groups. The border line of serum direct bilirubin level was estimated 1 mg/dl. During observation period of jaundice, however, decrease of direct bilirubin does not necessarily mean negative factor of diagnosis of biliary atresia.
