Types of Microtia
Microtia patients may range from having only a small ear to having no ear at all. The ear canal and the ear drum (tympanic membrane) may be partially formed or completely absent. The severity of the microtia is measured on a scale of Grade I to Grade IV.
- Grade I - Small abnormalities when compared with the opposite ear which require only minor ear reconstruction
- Grade II - Typically, the upper half of the ear is severely affected and the lower half appears quite normal
- Grade III - The ear is small and peanut-shaped, often with a partial earlobe, and there is no external ear canal or ear drum. Often referred to as "microtia with aural atresia," this is the most common form of microtia.
- Grade IV - The most severe form of microtia where there is no ear at all, also known as "anotia."