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Molecular pathology and genetics of congenital hepatorenal fibrocystic syndromes
  1. C A Johnson1,
  2. P Gissen1,
  3. C Sergi2
  1. 1Section of Medical and Molecular Genetics, Department of Paediatrics and Child Health, University of Birmingham Medical School, Birmingham B15 2TT, and The Liver Unit, Birmingham Children’s Hospital, Steelhouse Lane, Birmingham B4 6NH, UK
  2. 2Institute of Pathology, University of Heidelberg, INF 220, Germany and Department of Paediatric Pathology, St. Michael’s Hospital, Southwell Street, Bristol BS2 8EG, UK
  1. Correspondence to:
 Dr C A Johnson, Section of Medical and Molecular Genetics, Department of Paediatrics and Child Health, University of Birmingham Medical School, Birmingham B15 2TT, UK; 
 c.a.johnson{at}bham.ac.uk

Abstract

The hepatorenal fibrocystic (HRFC) syndromes are a heterogeneous group of severe monogenic conditions that may be detected before birth. Commonly, HRFC syndromes present in the neonatal and paediatric age, with consistent developmental abnormalities mostly involving the liver and kidney. The changes include the proliferation and dilatation of epithelial ducts in these tissues with abnormal deposition of extracellular matrix. In this review, we examine the clinical features and differential diagnoses of this group of syndromes, including autosomal recessive polycystic kidney disease (ARPKD), juvenile nephronophthisis (NPHP), Meckel-Gruber syndrome (MKS), Bardet-Biedl syndrome (BBS), and Jeune asphyxiating thoracic dystrophy (JATD). Extrahepatic manifestations include mostly bone and central nervous system abnormalities, dysmorphic features, and developmental delay. Previously, it has been suggested that ARPKD, JATD, and Ellis-van Creveld syndrome (EvC) may arise from defects in differentiation in a common developmental pathway. We review recent molecular advances in the recessive HRFC syndromes and discuss this hypothesis.

  • fibrocystic
  • kidney
  • liver
  • recessive

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