The term “microtia” is intuitive
In Latin, micro means “small”, and otia means “ear.” Microtia is a birth deformity of the ear that occurs in about one in every 10,000 live births.
Microtia can occur with other congenital abnormalities, but is most often seen as an isolated, independent deformity and is often associated with a small or absent ear canal.
Those who are most commonly affected include Asians, Hispanics and Caucasians. Males and females are affected at approximately the same rates.
Microtia is classified into four different types:
Grade I: A slightly small ear with a shape much like a normal ear, often accompanies by a small but narrow ear canal.
Grade II: A partial or hemi- ear with usually an absent ear canal.
Grade III: Absence of most of the external ear, with a small “peanut” shaped remnant ear lobule and an absent ear canal and ear drum (atresia). This is the most common grade of microtia.
Grade IV: Total absence of the ear or anotia.