This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Spondyloepiphyseal dysplasia (SED) is a group of rare genetic conditions that affect bone growth in the spine, arms, and legs. Other features include problems with vision and hearing, clubfeet, cleft palate, arthritis, and difficulty with breathing as curvature of the spine progresses. There are two main types of SED, spondyloepiphyseal dysplasia congenita (which is present from bith) and spondyloepiphyseal dysplasia tarda (which develops later in childhood or adolescence). Spondyloepiphyseal dysplasia is caused by mutations in genes that are responsible for making proteins that are needed for the creation of bone and cartilage. Most cases are due to a new (de novo) mutation, although it can be passed down through families. Treatment is aimed at managing the symptoms and associated complications as they arise.
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