Variable expression in a dominantly inherited skeletal dysplasia with similarities to brachydactyly E and spondyloepiphyseal‐ spondyloperipheral dysplasia

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Abstract
Variable expression and penetrance of dominantly inherited disorders present problems in diagnosis and counseling. The variation in clinical findings within a family with an autosomal dominant skeletal dysplasia is presented. In some members only shortened metacarpals were found, as seen in classic Brachydactyly E. Others presented with more severe and generalized skeletal involvement, such as is found in some of the spondyloepiphyseal dysplasias. This family may represent the true spectrum of Brachydactyly E; they may be affected with a specific spondyloepiphyseal dysplasia; or may represent a new syndrome. The 1st possibility is favored; this family emphasizes the importance of examining all affected members in a kindred with an autosomal dominant disease.

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