and objective: Alpha-1-antitrypsin deficiency presenting as neonatal cholestasis occurs in a small percentage of affected individuals. The prognosis is variable, from "healing" to liver cirrhosis and/or severe hepatocellular failure, requiring liver transplantation. We researched for predictors of outcome, including the effect of ursodeoxycholic acid. Methods: Retrospective cohort study of 27 cases of neonatal cholestasis due to alpha-1-antitrypsin deficiency, in the period between 1985 and

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... . Inclusion criteria: patients with neonatal cholestasis and ZZ phenotype. Exclusion criteria: presence of other diagnosis or known risk factors for developing neonatal cholestasis. We analyzed several clinical, biochemical, histological and therapeutic variables. Patients were categorized into two groups: favorable outcome (n=18), unfavorable outcome (n=9). We also divided the patients as treated (n=16), and untreated (n=11) with ursodeoxycholic acid. Results: Splenomegaly at admission (P=0.006) and persistent jaundice at 6 months old (P=0.007) were associated with unfavorable outcome. The values of conjugated bilirubin (P=1.000), aspartate aminotransferase (P=1.000), alanine aminotransferase (P=0.371) and gamma-glutamyltransferase (P=0.667) were not significantly different in both groups of outcome. Early treatm e nt with ursodeoxycholic acid was associated with a favorable outcome (P=0.011). Treated patients did not differ significantly from the untreated-ones in biochemical parameters (conjugated bilirubin, aspartate aminotransferase, alanine aminotransferase and gamma-glutamyltransferase), and had significantly lower alpha-1-antitrypsin serum levels (P=0.015). Conclusion: Splenomegaly at admission and persistence of jaundice at 6 months old were predictive for bad prognosis, and early treatment with ursodeoxycholic acid might have interfered positively in the outcome. J o u rn al of L iv e r