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Hyperostosis-hyperphosphatemia syndrome (HHS): report of two cases with a recurrent mutation and review of the literature

  • Soudeh Ghafouri-Fard EMAIL logo , Farzaneh Abbasi , Faezeh Azizi , Mona Javaheri , Mehrzad Mehdizadeh and Arya Setoodeh
Published/Copyright: August 5, 2014

Abstract

Hyperostosis-hyperphosphatemia syndrome (HHS) is a rare autosomal recessive metabolic disorder caused by mutations in the GALNT3 and FGF23 genes. The main features of this disorder include painful swelling of long bones, increased renal reabsorption of phosphate but normal renal function and vitamin D and parathormone levels. Previously, we reported a novel missense mutation in the FGF23 gene in a patient suffering from HHS. In the present report, we demonstrated the same mutation (c.471C>A) in two other cases of HHS with similar clinical manifestations. As this nucleotide change has not been reported previously, it can be a population specific mutation in Iran that can facilitate carrier testing and prenatal diagnosis of HHS.


Corresponding author: Soudeh Ghafouri-Fard, Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran, Phone/Fax: +982123872572, E-mail:

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Received: 2014-4-29
Accepted: 2014-6-24
Published Online: 2014-8-5
Published in Print: 2015-1-1

©2015 by De Gruyter

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