Multiple epiphyseal dysplasia

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Disease Profile

1-9 / 100 000

US Estimated

Europe Estimated

Age of onset

Infancy

ICD-10

Q77.3

Inheritance

Multiple epiphyseal dysplasia (MED) may be inherited in an autosomal dominant or autosomal recessive manner depending on the genetic cause. Most cases are autosomal dominant.^[2] In autosomal dominant inheritance, having a mutation in only one of the 2 copies of the responsible gene is enough to cause the condition. The mutation may be inherited from a parent or can occur for the first time in the affected person. Each child of a person with an autosomal dominant condition has a 50% (1 in 2) chance to inherit the mutation.

More rarely, MED is inherited in an autosomal recessive manner. In autosomal recessive inheritance, a person must have a mutation in both copies of the responsible gene to be affected. The parents of a person with an autosomal recessive condition usually each carry one mutated copy of the gene and are referred to as carriers. Carriers typically do not have signs or symptoms and are unaffected. When two carriers for the same condition have children, each child has a 25% (1 in 4) chance to be affected, a 50% (1 in 2) chance to be a carrier like each parent, and a 25% to be both unaffected and not a carrier.

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.

X-linked
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.

X-linked
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

Other names (AKA)

MED; Epiphyseal dysplasia, multiple; EDM

Summary

Multiple epiphyseal dysplasia (MED) is a group of disorders of cartilage and bone development, primarily affecting the ends of the long bones in the arms and legs (epiphyses). There are two types of MED, which are distinguished by their patterns of inheritance autosomal dominant and autosomal recessive. Signs and symptoms may include joint pain in the hips and knees; early-onset arthritis; a waddling walk; and mild short stature as adults. Recessive MED may also cause malformations of the hands, feet, and knees; scoliosis; or other abnormalities. Most people are diagnosed during childhood, but mild cases may not be diagnosed until adulthood. Dominant MED is caused by mutations in the COMP, COL9A1, COL9A2, COL9A3, or MATN3 genes (or can be of unknown cause), and recessive MED is caused by mutations in the SLC26A2 gene.^[1]

Symptoms

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: HPO ID
80%-99% of people have these symptoms
Abnormal cortical bone morphology		0003103
Abnormality of epiphysis morphology	Abnormal shape of end part of bone	0005930
Abnormality of T cell physiology		0011840
Abnormality of the carpal bones		0001191
Abnormality of the tarsal bones	Abnormal ankle bones	0001850
Abnormality of the ulna		0002997
Abnormality of vision	Abnormality of sight Vision issue [ more ]	0000504
Anteverted nares	Nasal tip, upturned Upturned nasal tip Upturned nose Upturned nostrils [ more ]	0000463
Brachydactyly	Short fingers or toes	0001156
Coarse metaphyseal trabecularization		0100670
Delayed skeletal maturation	Delayed bone maturation Delayed skeletal development [ more ]	0002750
Joint stiffness	Stiff joint Stiff joints [ more ]	0001387
Myopia	Close sighted Near sighted Near sightedness Nearsightedness [ more ]	0000545
Round face	Circular face Round facial appearance Round facial shape [ more ]	0000311
Sensorineural hearing impairment		0000407
Small hand	Disproportionately small hands	0200055
30%-79% of people have these symptoms
Abnormal form of the vertebral bodies		0003312
Flat face	Flat facial shape	0012368
Flattened femoral head	Flat head of thigh bone	0008812
Short stature	Decreased body height Small stature [ more ]	0004322
5%-29% of people have these symptoms
Anonychia	Absent nails Aplastic nails [ more ]	0001798
Hip dysplasia		0001385
Micromelia	Smaller or shorter than typical limbs	0002983

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Diagnosis

Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.

Organizations

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease

Little People of America, Inc.
617 Broadway #518
Sonoma, CA 95476
Toll-free: 1-888-572-2001
Telephone: +1-714-368-3689
Fax: +1-707-721-1896
E-mail: info@lpaonline.org
Website: https://www.lpaonline.org/

Learn more

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.

Where to Start

Genetics Home Reference (GHR) contains information on Multiple epiphyseal dysplasia. This website is maintained by the National Library of Medicine.
The National Organization for Rare Disorders (NORD) has a report for patients and families about this condition. NORD is a patient advocacy organization for individuals with rare diseases and the organizations that serve them.

In-Depth Information

GeneReviews provides current, expert-authored, peer-reviewed, full-text articles on multiple epiphyseal dysplasia, dominant and multiple epiphyseal dysplasia, recessive. These articles describe the application of genetic testing to the diagnosis, management, and genetic counseling of patients with specific inherited conditions.
Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
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.
Online Mendelian Inheritance in Man (OMIM) lists the subtypes and associated genes for Multiple epiphyseal dysplasia in a table called Phenotypic Series. Each entry in OMIM includes a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.
Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
PubMed is a searchable database of medical literature and lists journal articles that discuss Multiple epiphyseal dysplasia. Click on the link to view a sample search on this topic.

References

Multiple epiphyseal dysplasia. Genetics Home Reference. February 2008; https://ghr.nlm.nih.gov/condition/multiple-epiphyseal-dysplasia. Accessed 5/12/2011.
Multiple epiphyseal dysplasia. Genetics Home Reference. February 2008; https://ghr.nlm.nih.gov/condition/multiple-epiphyseal-dysplasia. Accessed 6/29/2012.

Rare Immunology News

Rare Immunology News

Rare Immunology News

Infancy

Q77.3

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.

X-linked 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.

X-linked 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

Other names (AKA)

Categories

Summary

Symptoms

Diagnosis

Testing Resources

Organizations

Organizations Supporting this Disease

Learn more

Where to Start

In-Depth Information

References

X-linked
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.

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