Ear Malformations (Microtia and Atresia)

What is Microtia-Atresia?

Microtia means that the external part of the ear is small, absent (anotia) or abnormally shaped. 90% of children with microtia have only one ear (unilateral) affected and 10% have microtia of both ears (bilateral). More children have microtia of the right ear than the left.

Atresia means that the ear canal is absent or severely narrowed. Atresia usually accompanies microtia, but not in all cases. Atresia impairs the hearing of the child in the affected side only.

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