Abstract
In contrast to anatomical variants, congenital malformations - synonymous with anomalies or dysplasia - are characterized by deviations not only from normal anatomical development but also from regular function. They can result from delayed development, abnormal embryogenesis or both due to spontaneous genetic mutations - this occurs in most congenital malformations of the outer and middle ear - genetic transmission and exogenous factors in about 10% of cases.
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