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Background & Aims Many pediatric patients with acute liver failure (PALF) do not receive a specific diagnosis (such as herpes simplex virus or Wilson disease or fatty acid oxidation defects)—they are left with an indeterminate diagnosis and are more likely to undergo liver transplantation, which is contraindicated for some disorders. Strategies to facilitate complete diagnostic testing should increase identification of specific liver diseases and might reduce liver transplantation. We investigated whether performing recommended age-specific diagnostic tests (AS-DTs) at the time of hospital admission reduces the percentage PALFs with an indeterminate diagnosis. Methods We performed a multinational observational cohort study of 658 PALF participants in the United States and Canada, enrolled at 10 medical centers, during 3 study phases from December 1999 through December 2014. A learning collaborative approach was used to implement AS-DT using an electronic medical record admission order set at hospital admission in phase 3 of the study. Data from 10 study sites participating in all 3 phases were compared before (phases 1 and 2) and after (phase 3) diagnostic test recommendations were inserted into electronic medical record order sets. Results The percentage of subjects with an indeterminate diagnosis decreased significantly between phases 1–2 (48.0%) and phase 3 (to 30.8%) (P = .0003). The 21-day cumulative incidence rates for liver transplantation were significantly different among phase 1 (34.6%), phase 2 (31.9%), and phase 3 (20.2%) (P = .030). The 21-day cumulative incidence rates for death did not differ significantly among phase 1 (17.9%), phase 2 (11.9%), and phase 3 (11.3%) (P = .20). Conclusions In a multinational study of children with acute liver failure, we found that incorporating diagnostic test recommendations into electronic medical record order sets accessed at time of admission reduced the percentage with an indeterminate diagnosis that may have reduced liver transplants without increasing mortality. Widespread use of this approach could significantly enhance care of acute liver failure in children. more...

Objectives Byler disease, originally described in Amish kindred, results from mutations in ATPase Class I Type 8b Member 1 (ATP8b1). Specific clinical reports of Amish Byler disease were last published 40 years ago. These investigations were directed at the present detailed clinical understanding of the early course of hepatic manifestations of Byler disease. Methods This study analyzed routine clinical practice and outcomes of children with Byler disease (defined by homozygous c.923G>T mutation in ATP8b1), who initially presented to Children's Hospital of Pittsburgh of UPMC between January 2007 and October 2014. Data were analyzed to the earlier of 24 months of age or partial external biliary diversion. Results Six children presented between 1 and 135 days of life: 2 presented with newborn direct hyperbilirubinemia, 2 had complications of coagulopathy, 1 had failure to thrive and rickets, and 1 sibling was identified by newborn genetic testing. Intensive fat-soluble vitamin supplementation was required to prevent insufficiencies in vitamins D, E, and K. Hyperbilirubinemia was variable both over time and between children. Serum bile acid levels were elevated, whereas γ-glutamyltranspeptidase levels were low normal. Scratching behavior (pruritus) was intractable in 4 of 6 children with onset between 6 and 12 months of age. Features of portal hypertension were not observed. Partial external biliary diversion was used during the second year of life in 4 children. Conclusions Detailed analysis of Byler disease revealed varied disease presentation and course. Nutritional issues and pruritus dominated the clinical picture in the first 2 years of life. more...

To determine health-related quality of life (HRQoL) and neurocognitive impairment in survivors of pediatric acute liver failure (PALF).A longitudinal prospective study was conducted. At 6 and 12 months after PALF presentation, surveys of HRQoL were completed for 2- to 19-year-olds and executive functioning for ages 2-16 years. At 12 months, patients 3-16 years of age completed neurocognitive testing. HRQoL scores were compared with a healthy, matched sample. Neurocognitive scores were compared with norms; executive functioning scores were examined categorically.A total of 52 parent-report HRQoL surveys were completed at 6 months, 48 at 12 months; 25 patients completed neurocognitive testing. The median age at 6 months was 7.9 years (range 3.5-15.0), and final diagnosis was indeterminate for 46.2% (n = 24). Self and parent-report on Pediatric Quality of Life Inventory Generic and Multidimensional Fatigue scales fell below the healthy sample at 6 months and 12 months (almost all P .001). Children reported lower mean scores on cognitive fatigue at 12 months (60.91 ± 22.99) compared with 6 months (73.61 ± 27.49, P = .006) . The distribution of Behavior Rating Inventory of Executive Function scores was shifted downward on parent-report (preschool) for all indices at 6 months (n = 14, P ≤ .003); Global Executive Composite and Emergent Metacognition at 12 months (n = 10, P = .03). Visual Motor Integration (VMI-6) Copying (mean = 90.3 ± 13.8, P = .0002) and VMI-6 Motor Coordination (mean = 85.1 ± 15.2 P = .0002) fell below norms, but full scale IQ (Wechsler Scales) and Attention (Conners' Continuous Performance Test) did not.Survivors of PALF appear to show deficits in motor skills, executive functioning, HRQoL, and evidence for worsening cognitive fatigue from 6 to 12 months following PALF presentation. more...

To investigate the heterogeneity in clinical course among those with pediatric acute liver failure (PALF) of indeterminate disease etiology.We studied participants enrolled in the PALF registry study with indeterminate final diagnosis. Growth mixture modeling was used to analyze participants' international normalized ratio, total bilirubin, and hepatic encephalopathy trajectories in the first 7 days following enrollment. Participants with at least 3 values for 1 or more of the measurements were included. We examined the association between the resulting latent subgroup classification with participants' characteristics and disease outcomes. Data from participants with PALF of specified etiologies were used to investigate the potential diagnostic value of the latent subgroups.In this sample of 380 participants with indeterminate final diagnosis, 115 (30%) experienced mild and quickly improving disease trajectories and another 48 (13%) started with severe disease but improved by day 7. The majority of participants (216, 57%) had disease trajectories that worsened over time. The identified patterns of disease trajectories are predictive of outcome (P.001). The trajectory patterns are associated with the underlying disease etiology (P.001) for the 488 participants with PALF of specified etiologies.The clinical courses of participants with PALF of indeterminate disease etiology exhibit distinct trajectory patterns, which have important prognostic and potentially diagnostic value. more...