Hepatorenal findings in obligate heterozygotes for autosomal recessive polycystic kidney disease

Meral Gunay-Aygun, Baris I. Turkbey, Joy Bryant, Kailash T. Daryanani, Maya Tuchman Gerstein, Katie Piwnica-Worms, Peter Choyke, Theo Heller, William A. Gahl

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Autosomal recessive polycystic kidney disease (ARPKD), characterized by progressive cystic degeneration of the kidneys and congenital hepatic fibrosis (CHF), is the most common childhood onset ciliopathy, with an estimated frequency of 1 in 20,000 births. It is caused by mutations in PKHD1. The carrier frequency for ARPKD in the general population is estimated at 1 in 70. Given the recessive inheritance pattern, individuals who are heterozygous for PKHD1 mutations are not expected to have clinical findings. We performed ultrasound (USG) evaluations on 110 parents from 64 independent ARPKD families and identified increased medullary echogenicity in 6 (5.5%) and multiple small liver cysts in 10 parents (9%). All ARPKD parents with these abnormal imaging findings were asymptomatic; kidney and liver function tests were unremarkable. Complete sequencing of PKHD1 in the 16 ARPKD parents with abnormal imaging confirmed the mutation transmitted to the proband, but did not reveal any other pathogenic variants. Our data suggest that carrier status for ARPKD is a predisposition to polycystic liver disease and renal involvement associated with increased medullary echogenicity on USG. Whether some of these individuals become symptomatic as they age remains to be determined.

Original languageEnglish (US)
Pages (from-to)677-681
Number of pages5
JournalMolecular genetics and metabolism
Issue number4
StatePublished - Dec 2011
Externally publishedYes


  • Autosomal recessive polycystic kidney disease
  • Congenital hepatic fibrosis
  • Medullary sponge kidney
  • Nephrocalcinosis
  • PKHD1
  • Polycytsic liver disease

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Endocrinology


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