Relation between amount of bile ducts in portal canal and outcomes in biliary atresia

Background There is no good prognostic indicator for biliary atresia (BA). We reviewed liver biopsies taken during the initial procedure to find a prognostic marker. Methods Thirty-two BA cases underwent Kasai operation from 1976 to 2009. We compared two groups at 1, 3, and 9 years. Group A required liver transplantation or died. Group B survived with their native liver. Biopsies were analyzed for liver fibrosis, portal-central vein bridging (P–C bridging), ductal plate malformation (DPM) and the number of the bile ducts in portal canal/measured surface area of the portal canal (BDP ratio). Statistical comparisons of the multiple data were evaluated by Mann–Whitney U test, Student’s t test and Pearson’s Chi-square test. Regression analysis with P < 0.05 was considered significant. Results BDP ratios (/mm 2 ) were 2.4 ± 1.5 in Group A1 ( n = 9) vs 4.6 ± 2.4 in Group B1 ( n = 23) ( P = 0.01); 2.6 ± 1.4 in Group A3 ( n = 14) vs 5.1 ± 2.5 in Group B3 ( n = 18) ( P < 0.01), 3.0 ± 2.2 in Group A9 ( n = 15) vs 4.9 ± 2.5 in Group B9 ( n = 15) ( P < 0.05). There was no significant difference in any other finding. Conclusion The BDP ratio is a sound prognostic indicator in BA.