Multiple anomalies in gongenitally deaf children

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Abstract
Records of 449 students in the Pennsylvania School for the Deaf were reviewed to determine the incidence of congenital anomalies. Information in these records permitted separation of the children into 3 groups: (1) acquired deafness, (2) congenital non-hereditary deafness, (3) congenital, apparently hereditary deafness. There was a greater incidence of associated defects in those with congenital deafness than in those whose deafness followed postnatal illness of injury. In the former, multiple defects were also more frequent. Different types of anomalies appeared when congenital deafness was separated into hereditary and nonhereditary causes.