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Disease Profile

Spondyloepiphyseal dysplasia

Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.


US Estimated

Europe Estimated

Age of onset





Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.


Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.


dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.


recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.


Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.


Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.


Not applicable



Eye diseases


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, clubfeetcleft 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).[1][2] 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.[1]


This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Medical Terms Other Names
Learn More:
80%-99% of people have these symptoms
Abnormality of epiphysis morphology
Abnormal shape of end part of bone
Abnormality of the metaphysis
Abnormality of the wide portion of a long bone
Ovoid vertebral bodies
Flattened vertebrae
Disproportionately short upper portion of limb
Short thorax
Shorter than typical length between neck and abdomen
Skeletal dysplasia
30%-79% of people have these symptoms
Cleft palate
Cleft roof of mouth
Coxa vara
Prominent swayback
Close sighted
Near sighted
Near sightedness

[ more ]

Degenerative joint disease

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These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • Medscape Reference has information on spondyloepiphyseal dysplasia in general. You may need to register to view this medical reference, but registration is free.


    1. A to Z: Spondyloepiphyseal Dysplasia (SED). Kids Health from Nemours. 2016; https://kidshealth.org/en/parents/az-sed.html.
    2. Parikh S. Spondyloepiphyseal Dysplasia. Medscape Reference. November 2, 2015; https://emedicine.medscape.com/article/1260836-overview.