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Hypotrichosis with cone-rod dystrophy in a patient with cadherin 3 (CDH3) mutation

  • F. NasserEmail author
  • L. Mulahasanovic
  • M. Alkhateeb
  • S. Biskup
  • K. Stingl
  • E. Zrenner
Clinical Case Report
  • 27 Downloads

Abstract

Purpose

To investigate a very rare case of hypotrichosis with cone-rod dystrophy caused by a P-cadherin CDH3 mutation.

Methods

A 16-year-old Syrian girl was examined at age 9 and 14 years with an ophthalmological examination, fundus imaging, OCT and electrophysiological recordings (ERG and PERG). A disease-targeted gene panel sequencing was performed.

Results

Fundus images showed pigmentations at the posterior eye pole to the mid periphery, as well as vessel tortuosity. OCT images revealed a loss of the outer retinal segments and IS/OS in the central macula. The scotopic and photopic ERGs showed moderately reduced amplitudes at age 9 years that became severely reduced at age of 14 years. The PERG was undetectable at age 9 years. In color vision testing, protan–deutan confusion errors occurred. Gene panel analysis revealed one homozygous mutation in CDH3 (c.1508G>A; p.Arg503His).

Conclusion

This case shows that a CDH3 mutation besides macula dystrophy can cause widespread cone-rod dystrophy with hypotrichosis without any other pathology besides hypoplastic nails. This points to a common pathway of hair growth and photoreceptor development that can be disturbed by a CDH3 mutation (c.1508G>A; p.Arg503His) located in the EC4 repeat region of the gene.

Keywords

Hypotrichosis Electroretinography Cone-rod dystrophy CDH3 

Notes

Acknowledgements

We thank Dr. Anne Kurtenbach for her critical reading of the manuscript and Dr. Torsten Strasser for his help with the ERG analysis.

Funding

The study was supported by grants from the German Research Council (DFG Excellence Center EXC307) to EZ, and from the Tistou and Charlotte Kerstan Foundation to FN.

Compliance with ethical standards

Conflict of interest

All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

Statements of human rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

Statement on the welfare of animals

This article does not contain any studies with animals performed by any of the authors.

Informed consent

Informed consent was obtained from both parents of the participant included in the study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute for Ophthalmic Research, Centre for OphthalmologyUniversity of TuebingenTübingenGermany
  2. 2.Praxis for Human GeneticsTübingenGermany
  3. 3.CeGaT GmbHTübingenGermany
  4. 4.Eye and Ear Specialty HospitalDamascusSyria
  5. 5.Werner Reichardt Center for Integrative Neuroscience (CIN)University of TuebingenTübingenGermany

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