Otolaryngology Book

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Otosclerosis

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  1. Epidemiology
    1. Autosomal dominant trait, with poor penetrance
    2. Most often presents in middle-aged white women
  2. Pathophysiology
    1. Abnormal bone deposition at base of stapes (footplate)
    2. Stapes fixed to oval window and unable to vibrate
  3. Signs
    1. Conductive Hearing Loss or mixed Hearing Loss
    2. Hearing Loss usually limited to 50 decibels
    3. Bilateral involvement is most common
  4. Management
    1. Hearing Aid
    2. Sodium fluoride: halts or retards progression
    3. Surgery: Stapedotomy or Stapedectomy
      1. Restore transmission with middle ear prosthesis
      2. Improvement in 95% of patients

Otosclerosis (C0029899)

Definition (MSH)Formation of spongy bone in the labyrinth capsule which can progress toward the STAPES (stapedial fixation) or anteriorly toward the COCHLEA leading to conductive, sensorineural, or mixed HEARING LOSS. Several genes are associated with familial otosclerosis with varied clinical signs.
Definition (CSP)pathological condition of the bony labyrinth of the ear, in which there is formation of spongy bone; may cause bony ankylosis of the stapes, resulting in conductive hearing loss; cochlear otosclerosis may also develop, resulting in sensorineural hearing loss.
ConceptsDisease or Syndrome (T047)
ICD9387, 387.9
BasqueOTOSKLEROSIA
DanishOtosklerose
DutchOtosclerose
EnglishOtoscleroses, Otosclerosis, Otospongioses, Otospongiosis, OTS, OTSC1
FinnishOTOSKLEROOSI
FrenchOtosclerose
GermanOtosklerose
Hungarianotosclerosis
ItalianOtosclerosi
NorwegianOTOSKLEROSE
PortugueseOtoesclerose
SpanishOtoesclerosis, otoespongiosis
SwedishOTOSKLEROS
Parent ConceptsLabyrinthine disorder (C0022890), Otosclerosis (C0029899), Ear and mastoid disease NOS (C0178269), Ear structure (C0013443), Diagnosis/Diseases Component (C0497531), Ear Diseases (C0013447), Acquired abnormality of ear ossicles (C0395892), Duplicate concept (C1274013)
SourcesAOD, COSTAR, CSP, CST, DXP, ICD9CM, ICPC, ICPCBAQ, ICPCDAN, ICPCDUT, ICPCFIN, ICPCFRE, ICPCGER, ICPCHUN, ICPCITA, ICPCNOR, ICPCPOR, ICPCSPA, ICPCSWE, LCH, MSH, MTH, NDFRT, OMIM, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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