A hereditary syndrome with retinopathy and ataxia or deafness in two consanguineous brothers

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Abstract
Of two brothers born of Sephardic first cousin parents one presented with congenital neural deafness, nyctalopia, visual field loss, flat ERG, unintelligible speech and a shuffling gait, and the other with severe ataxia, severe decreased visual acuity, mild field loss, decreased ERG, dysarthric speech and high grade myopia. The diagnosis of Usher syndrome type 1 or 2 is discussed as well as the possibility that both brothers have different genetic disorders.