title: Cochlear implantation in children with congenital and noncongenital unilateral deafness: a case series.
abstract: OBJECTIVE
  Cochlear implantation is rapidly gaining acceptance as the most effective treatment for adult patients with unilateral deafness. The benefits for the pediatric population remain to be investigated. This study aimed to investigate the implications of cochlear implantation in children with congenital and noncongenital unilateral deafness.
  
  
  METHODS
  Four children, three with congenital and one with a sudden unilateral deafness, were studied after implantation. The children were aged 17 months, 4.5 years, 6.8 years, and 9 years at the time of implantation. Speech perception in noise and sound localization ability were evaluated using age-appropriate materials.
  
  
  RESULTS
  The child with postlingual unilateral deafness rapidly integrated the normal acoustic hearing with the electrical signal from the cochlear implant and showed binaural benefits, as indicated by the localization ability and the improvement of speech perception in noise scores. The younger child with congenital unilateral deafness showed some clinical evidence of binaural integration and the two older children with congenital deafness have not yet indicated signs of binaural benefits.
  
  
  CONCLUSIONS
  It seems that cochlear implantation in children with congenital unilateral deafness may provide some of the benefits of binaural hearing if implantation occurs within the critical period for bilateral auditory development.
authors.affiliation: *Otolaryngology, Head and Neck Surgery, School of Surgery, University of Western Australia, Perth, Australia; †Fremantle Hospital Campus, Fremantle, Australia; and ‡Fiona Stanley Hospital, Perth, Australia.
authors.forename: Dayse
authors.initials: D
authors.lastname: Távora-Vieira
authors.forename: Gunesh P
authors.initials: GP
authors.lastname: Rajan
mesh_terms: D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation; D003054:Cochlear Implants; D005260:Female; D006309:Hearing / Q000502:physiology; D006319:Hearing Loss, Sensorineural / Q000151:congenital / Q000503:physiopathology / Q000601:surgery*; D046088:Hearing Loss, Unilateral / Q000151:congenital / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007223:Infant; D008297:Male; D009622:Noise; D013017:Sound Localization / Q000502:physiology*; D013067:Speech Perception / Q000502:physiology*; D016896:Treatment Outcome