ICD-11 classes
10 Diseases of the ear or mastoid process
Diseases of external ear
Noninflammatory disorders of the external ear
AA40 — Acquired deformity of external auditory canal
AA40.1 — Acquired stenosis of external auditory canal

ICD-11 AA40.1 — Acquired stenosis of external auditory canal

Acquired stenosis of external auditory canal was described as resulting from a number of different causes. Since then, histology and imaging studies of this disease have shown that a common cascade of inflammatory changes resulting from these different causes is the primary pathogenesis leading to medial canal fibrosis. Once there is complete obstruction of the external auditory canal, surgery is the primary treatment.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.