Exostosis of External Ear Canal

Aka: Exostosis of External Ear Canal, Ear Canal Exostoses, Auditory Canal Exostosis, Surfer's Ear

II. Pathophysiology

  1. Benign bony growth of ear canal
  2. Composed of dense compact bone

III. Epidemiology

  1. Associated with cold water swimming
  2. Most common tumor of auditory canal

IV. Symptoms

  1. Conductive Hearing Loss (typically painless)

V. Signs

  1. Bilateral, multiple bony growths within the external auditory canal
  2. Adjacent to Tympanic Membrane

VI. Differential Diagnosis

  1. Conductive Hearing Loss
  2. Ear Tumor

VII. Management

  1. Excision if Hearing Loss or Otalgia
  2. Excision Indications
    1. Obstructive symptoms (e.g. Conductive Hearing Loss)
    2. Secondary infection

VIII. References

  1. Michels (2019) Am Fam Physician 100(2): 98-108 [PubMed]

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Related Studies

Ontology: Exostosis of external ear canal (C0155411)

Concepts Disease or Syndrome (T047)
ICD9 380.81
SnomedCT 19560007
English EAC exostosis, EAR EXOSTOSES, EXOSTOSES OF EXTERNAL AUDITORY CANAL, exostosis of external ear canal (diagnosis), exostosis of external ear canal, Exostosis ext ear canal, Exostosis of external ear canal, External auditory canal exostosis, Swimmers exostosis, Exostosis of external ear canal (disorder), exostosis; external ear canal, external ear canal; exostosis
Italian Esostosi del condotto uditivo esterno
Japanese 外耳道の外骨腫, ｶﾞｲｼﾞﾄﾞｳﾉｶﾞｲｺﾂｼｭ
Czech Exostóza zevního zvukovodu
Spanish exostosis de conducto auditivo externo (trastorno), exostosis del canal del oído externo, exostosis de conducto auditivo externo, exostosis del canal del oído externo (trastorno), Exostosis del conducto auditivo externo
Hungarian külső hallójárat exostosis
Dutch exostose; uitwendige gehoorgang, uitwendige gehoorgang; exostose, exostose van de uitwendige gehoorgang
French Exostose du conduit auditif externe
Portuguese Exostose do canal auditivo externo
German Exostose des aeusseren Hoerganges
Derived from the NIH UMLS (Unified Medical Language System)

Ontology: Surfer's ear (C0242113)

Concepts Disease or Syndrome (T047)
Dutch surfers-oor
French Syndrome du surfeur
German Surfer's Ear
Italian Orecchio del surfista
Portuguese Ouvido de surfista
Spanish Oído de surfista
Japanese サーファーズイア, ｻｰﾌｧｰｽﾞｲｱ
Czech Potápěčské ucho
Hungarian Surfer-fül
English Surfer's ear
Derived from the NIH UMLS (Unified Medical Language System)

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