||The term "microtia" is used when there is gross hypoplasia of the pinna with a blind or absent external auditory canal.
The degrees of microtia embrace a spectrum, ranging from a mere nubbin of tissue with no recognizable auricular features to a formed auricular appendage that is slightly deformed and smaller than usual. Microtia is typically bilateral, although the degree of deformity may differ on the two sides.
This child was born with severe microtia of both ears, absent external canals, and malformed rudimentary ossicles. Brain stem audiometry revealed almost normal cochlear function.