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AIM: To determine whether there was an association between inter-cellular adhesion molecule-1 (ICAM-1) gene polymorphism and biliary atresia (BA), and to investigate the relationship between serum soluble ICAM-1 (sICAM-1)and clinical outcome in BA patients after surgical treatment.METHODS: Eighty-three BA patients and 115 normal controls were genotyped. K469EICAM-1 polymorphism was analyzed using PCR assay. Serum sICAM-1 was determined using ELISA method from 72 BA patients. In order to evaluate the association between these variables and their clinical outcome, the patients were categorized into two groups:patients without jaundice and those with persistent jaundice.RESULTS: There were no significant differences between BA patients and controls in terms of gender, K469E ICAM-1genotypes, and alleles. The proportion of patients having serum sICAM-1 ≥3 500 ng/mL in persistent jaundice group was significantly higher than that in the other group. In addition, there was no association between K469EICAM-1polymorphism and the status of jaundice in BA patients after Kasai operation.CONCLUSION: ICAM-1 possibly plays an important and active role in the disease progression. However, the process is not associated with genetic variation of K469EICAM-1 polymorphism.