title: Autoimmune sensorineural hearing loss in young patients: an exploratory study.
abstract: OBJECTIVE
  P0 protein is expressed exclusively in myelinating Schwann cells of the peripheral nervous system. In a previous study from our laboratory, 27% of patients with sensorineural hearing loss (SNHL) had antibodies to P0 protein in their serum. The purpose of the present exploratory study was to examine the relationship between the clinical presentation of SNHL among children and young adults (age range, 5-30 y) and the presence of serum anti-P0 antibodies.
  
  
  METHODS
  The data were collected by retrospective questionnaires from Belgian otolaryngologists.
  
  
  METHODS
  Patients were divided for comparison into two groups according to the presence or absence of anti-P0 antibodies.
  
  
  RESULTS
  Analyses of clinical data and audiometric results indicated that a progressive hearing loss was more frequently recorded in the patients in the anti-P0 antibody-positive group (82% [14 of 17]) than in those in the anti-P0 antibody-negative group (35% [6 of 17]) (P <.005).
  
  
  CONCLUSIONS
  Thus, in the age group in the present study, autoimmune SNHL (as measured in the present study by the presence of anti-P0 antibodies) is more frequently associated with progressive than with sudden hearing loss. The implications of this finding for preventive screening of hearing loss in children and young adults are discussed.
authors.affiliation: Laboratory of Autoimmunity and the Department of Otorhinolaryngology, University of Louvain Medical School, Brussels, Belgium. tomasi@mblg.ucl.ac.be
authors.forename: J P
authors.initials: JP
authors.lastname: Tomasi
authors.forename: A
authors.initials: A
authors.lastname: Lona
authors.forename: N
authors.initials: N
authors.lastname: Deggouj
authors.forename: M
authors.initials: M
authors.lastname: Gersdorff
mesh_terms: D000293:Adolescent; D000328:Adult; D001323:Autoantibodies / Q000097:blood*; D001327:Autoimmune Diseases / Q000276:immunology*; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000276:immunology*; D006801:Humans; D015151:Immunoblotting; D008297:Male; D018993:Myelin P0 Protein / Q000276:immunology*
chemical_list: D001323:Autoantibodies; D018993:Myelin P0 Protein