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Usher syndrome

What are the symptoms?

There are three types of the syndrome. Type I is characterised by profound congenital hearing loss, poor balance and retinitis pigmentosa before the age of 10. Type II presents moderate to severe hearing loss, normal balance and retinitis pigmentosa develops in the late teens or early 20's. Type III is characterised by progressive hearing loss and Retinitis Pigmentosa progressing at a variable rate, generally with onset around the second or third decade of life.

View Background Background  |  How is it diagnosed? View How is it diagnosed?

Medical text written November 1991 by Contact a Family. Approved November 1991 by Professor M Patton, Professor of Medical Genetics, St Georges Hospital Medical School, London, UK and Dr J E Wraith, Consultant Paediatrician, Royal Manchester Children's Hospital, Manchester, UK. Last updated June 2006 by Dr. Maria Bitner-Glindzicz, Academic Head of the Clinical and Molecular Genetics Unit, Institute of Child Health, London, UK.

 

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