Auditory Neuropathy Spectrum Disorder

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 Inclusion criteria:

  • Diagnosis of ANSD (based on evidence from ABR testing, OAEs and tympanometry)
  • Apparently non-syndromic
  • Completed Visual Evoked Potentials examination
  • Normal vestibulocochlear nerves and cochlear morphology on MRI scanning
  • Absence of clinically apparent peripheral neuropathy

Exclusion criteria:

  • Prematurity (<37 weeks gestation or requiring >48 hours NICU )
  • Severe jaundice
  • Known syndrome
  • Peripheral neuropathy

Prior genetic testing guidance

  • Results should have been reviewed for all genetic tests undertaken, including disease-relevant genes in exome sequencing data. The patient is not eligible if they have a molecular diagnosis for their condition.
  • Genetic testing should continue according to routine local practice for this phenotype regardless of recruitment to the project; results of these tests must be submitted via the ‘Genetic investigations’ section of the data capture tool to allow comparison of WGS with current standard testing.

PLEASE NOTE: The sensitivity of WGS compared to current diagnostic genetic testing has not yet been established. It is therefore important that tests which are clinically indicated under local standard practice continue to be carried out.

Prior genetic testing genes 

Testing of the following genes should be carried out PRIOR TO RECRUITMENT where this is in line with current local practice:

  • OPA1 if VEP prolonged

Closing statement 

These requirements will be kept under continual review during the main programme and may be subject to change.

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