What is Atresia

Aural Atresia is an underdeveloped external ear canal, eardrum and middle ear bones.


Aural Atresia is often associated with Microtia

90% with Microtia & Atresia have a conductive hearing loss

Although the outer and middle ear anatomy is affected in Aural Atresia, most have a normal functioning inner ear (cochlea and auditory nerve)

Atresia Treatment Options

  • Bone Anchored Hearing Systems
  • Canalplasty
  • No treatment


Schuknecht, 1989, describes 4 types of Aural Atresia