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The clinical spectrum of Fontan-associated liver disease: results from a prospective multimodality screening cohort

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  • I.D. Munsterman
  • A.L. Duijnhouwer
  • Timothy Kendall
  • C.M. Bronkhorst
  • M. Ronot
  • M. van Wettere
  • A.P.J. van Dijk
  • J.P.H. Drenth
  • E.T.T.L. Tjwa

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https://doi.org/10.1093/eurheartj/ehy620
Original languageEnglish
Pages (from-to)353-360
JournalEuropean Heart Journal
Volume39
Issue number2
Early online date20 Oct 2018
DOIs
Publication statusPublished - Feb 2019

Abstract

Aims
Liver fibrosis and cirrhosis are a consequence of a Fontan physiology, and determine prognosis. It is unclear whether non-invasive assessment of liver pathology is helpful to provide clinically relevant information. The aims of this study were to assess the spectrum of Fontan-associated liver disease (FALD) and usefulness of non-invasive methods to assess biopsy confirmed liver fibrosis.
Methods
Hepatic screening of consecutive patients consisted of a blood panel, ultrasonography, elastography, contrast-enhanced MRI/CT, and liver biopsy (scored with Fontan specific fibrosis scores and collagen proportionate area; CPA). Fibrosis parameters, varices, ascites, and splenomegaly were measured on imaging.
Results
38/49 referred patients (27 ± 6.6 years, 73.7% male) underwent the complete screening protocol. Liver fibrosis on biopsy was present in all patients, and classified as severe (stage 3-4) in 68%. Median CPA was 22.5% (16.9-29.5) and correlated with individual fibrosis scores. ELF® and liver stiffness were elevated, but MELD-XI scores were low in all patients. Fibrosis severity neither correlated to ELF® and liver stiffness, nor to (semi-) quantitative fibrosis parameters on MRI/CT. Varices were present in 50% and hyper-enhancing nodules in 25% of patients, both independent of fibrosis stage, but varices were associated with higher CPA values.
Conclusion
The FALD spectrum includes both hepatic congestion and severe fibrosis, with signs of portal hypertension and hyper-enhancing nodules as significant manifestations. Routine imaging, transient elastography and serum biomarkers are unable to accurately assess severity of liver fibrosis in this cohort. Future research should focus on validating new diagnostic tools with biopsy as the reference standard.
Keywords (6): Fontan, Fontan-associated liver disease, liver fibrosis/cirrhosis, , liver biopsy, screening, nodules

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