Hepatic Steatosis is Prevalent following Orthotopic Liver Transplantation in Children with Cystic Fibrosis

Objectives: Systematic study of allograft liver histology in children undergoing orthotopic liver transplantation (LT) for cystic fibrosis-related liver disease (CFLD). Methods: Retrospective clinicopathologic review of explants and allograft liver biopsies from 13 children and adolescents with CFLD. Results: In this study, the median age at LT for CFLD was 15.7 years. Notably, 10 of 13 (77%) CF explants had >5% steatosis and 8 of 13 (61.5%) demonstrated variable fibrosis. The median age, gender, type of transplant (liver vs liver-lung), pancreatic insufficiency (PI) status, BMI%ile, genotype and prevalence of diabetes were comparable in those with and without explant steatosis. More than half of allograft biopsies showed significant steatosis (17/31, 54.8%) and lobular inflammation (16/31, 51.6%). Hepatocyte ballooning was less frequent (5/31, 16.1%). Overall, 6 patients (46.2%) had allograft steatosis that worsened over time in 2 patients (33%). None had advanced fibrosis (≥stage 3). Patients with allograft steatosis had significantly more biopsies, were more likely to be 'liver only' recipients, had a shorter interval since transplant and higher BMI%ile (though

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