1. Hearing disorders of the outer ear
Auricle
Microtia
Anotia
Tumours 1

2. Conditions of the External ear canal
Atresia
Stenosis
Collapse
Foreign bodies/Wax
Tumours/Exostoses
Various types of external otitis (Furunculosis, Myringitis, Necrotic or Malignant) 2

3. Consequences Conductive hearing loss Degree may be mild in some cases.
Up to 60 dB of hearing loss 3