Su1022 Medication Level Variability Index (Mlvi) and Non-Adherence in Children Undergoing Liver Transplantation in Use of Tacrolimus

Abstract

Backgrounds/aims De-novo autoimmune hepatitis (AIH) after liver transplantation (LT) is rising. Yet there is scarcity of data on the characteristics and the long-term outcomes of this condition. The aim of this study is to investigate the clinical characteristics and long-term outcomes of patients with de novo AIH following LT.Methods Using transplant liver biopsy database, we identified all patients with de-novo AIH following LT at our institution between 2008 and 2013. Patients with hepatitis C virus infection were excluded. The diagnosis of de-novo AIH was made according to the classical and simplified criteria defined by the International Autoimmune Hepatitis Group. Clinical information was gathered from electronic medical records. H&E stained sections and histochemical stains from the liver biopsies revealed findings compatible with AIH. Results A total of nineteen patients with de-novo AIH were identified (58% female, median age of 46 years), with mean international autoimmune hepatitis score of 12.1. Underlying liver disease were primary sclerosing cholangitis (n=4), primary biliary cirrhosis (n=3), biliary atresia (n=3), drug induced liver failure (n=2), alcoholic hepatitis (n=2) and others (n=5). The interval period from the LT to diagnosis of de-novo AIH was 19.6 months (1.6-197.8), during which 11 (58%) patients developed at least one episode of acute cellular rejection prior to the diagnosis of de-novo AIH. All patients were successfully treated with corticosteroids and incremental dose in immunosuppression. All showed complete biochemical response to treatment but 9 (47.4%) patients relapsed upon tapering down corticosteroids. Patients were followed over 6.7 year (1.5-17) years post-LT. Eight (42%) patients progressed to cirrhosis of whom 3 (15%) patients expired and 2 (10%) required second LT due to complications of end stage liver disease. Conclusion The present study shows the long term clinical outcomes of the patients with de-novo AIH post-LT. Although most patients exhibit a good initial response to medical therapy, de-novo AIH post-LT is likely to recur and progress to liver cirrhosis. Therefore, we should consider denovo AIH in patients who show abnormal liver tests or graft dysfunction after LT.