Lymphatic Dysplasia Shapes Liver Epithelial Outcomes in Biliary Atresia

Biliary Atresia (BA) is the leading cause of pediatric liver transplantation. Given the heterogeneity of the disease, outcomes after diagnosis remain unpredictable. A multiscale atlas of BA hepatic tissue established early lymphatic dysplasia in infants that later proceed toward liver failure and transplantation (severe BA). An architecturally distorted, immature and CCL21-high lymphatic vasculature marked severe BA, along with an expanding cholangiocyte compartment pivoting toward immune-reactive MMP7/SOX9-high states. Hepatocyte-to-biliary transdifferentiation emerged broadly across BA- and

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