National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Metaphyseal chondrodysplasia Schmid type



Other Names:
MCDS
Categories:
This disease is grouped under:

Metaphyseal chondrodysplasia, Schmid type (MCDS) is a type of skeletal disorder in which there is abnormal bone formation at the end of the long bones (metaphyses). Symptoms include short stature with abnormally short arms and legs (short-limbed dwarfism) and bowed legs (genu varum). Additional signs and symptoms may include lumbar lordosis, leg pain, joint pain, hip deformities, and an outward flaring of the bones of the lower rib cage. As a result of the hip and leg findings, individuals with this condition may have an unusual walk that resembles a waddle. The condition is often mistaken for vitamin D-deficient rickets.[1][2] MCDS is caused by a mutation in one of the collagen genes known as COL10A1. The mutation may be inherited from a parent or may happen for the first time in an affected individual.[1][2] The MCDS mutation is passed on in an autosomal dominant manner.[1][2][3] Treatment may include physical therapy and/or orthopedic surgery and often requires a team of specialists. Early intervention is important to help children with MCDS reach their potential.[1]
Last updated: 1/20/2017

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.

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Medical Terms Other Names
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HPO ID
80%-99% of people have these symptoms
Abnormality of the metaphysis
Abnormality of the wide portion of a long bone
0000944
Coxa vara 0002812
Genu varum
Outward bow-leggedness
Outward bowing at knees
[ more ]
0002970
Limb undergrowth
limb shortening
Short limb
Short limbs
[ more ]
0009826
Moderately short stature
Moderate short stature
0008848
30%-79% of people have these symptoms
Abnormality of bone mineral density 0004348
Brachydactyly
Short fingers or toes
0001156
Craniosynostosis 0001363
Diaphyseal thickening
Thickening of shaft or central part of long bones
0005019
Frontal bossing 0002007
Hearing impairment
Deafness
Hearing defect
[ more ]
0000365
Hypercalcemia
High blood calcium levels
Increased calcium in blood
[ more ]
0003072
Micrognathia
Little lower jaw
Small jaw
Small lower jaw
[ more ]
0000347
5%-29% of people have these symptoms
Abnormality of epiphysis morphology
Abnormal shape of end part of bone
0005930
Irregular acetabular roof 0008833
Irregular vertebral endplates 0003301
Platyspondyly
Flattened vertebrae
0000926
Percent of people who have these symptoms is not available through HPO
Autosomal dominant inheritance 0000006
Broad middle phalanx of finger
Broad middle finger bones
0009844
Distal tibial bowing 0006414
Enlargement of the proximal femoral epiphysis
Enlarged end part of innermost thighbone
0003371
Femoral bowing
Bowed thighbone
0002980
Metaphyseal chondrodysplasia 0005871
Metaphyseal cupping of metacarpals
Cupping of wide portion of long bone of hand
0006028
Metaphyseal cupping of proximal phalanges 0006208
Mild short stature 0003502
Proximal femoral metaphyseal abnormality
Abnormal wide portion of innermost thighbone
0006431
Short distal phalanx of finger
Short outermost finger bone
0009882
Short middle phalanx of finger
Short middle bone of finger
0005819
Waddling gait
'Waddling' gait
Waddling walk
[ more ]
0002515
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Last updated: 7/1/2020

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.

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Related diseases are conditions that have similar signs and symptoms. A health care provider may consider these conditions in the table below when making a diagnosis. Please note that the table may not include all the possible conditions related to this disease.

Conditions with similar signs and symptoms from Orphanet
Hypochondroplasia (see this term) and sequelae from rickets are the principle differential diagnoses. Other metaphyseal dysplasias (such as cartilage-hair hypoplasia or Jansen type metaphyseal chondrodysplasia; see these terms) can be excluded as they are associated with very short stature and other features.
Visit the Orphanet disease page for more information.

Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Patient Registry

  • A registry supports research by collecting of information about patients that share something in common, such as being diagnosed with Metaphyseal chondrodysplasia Schmid type. The type of data collected can vary from registry to registry and is based on the goals and purpose of that registry. Some registries collect contact information while others collect more detailed medical information. Learn more about registries.

    Registries for Metaphyseal chondrodysplasia Schmid type:
    International Skeletal Dysplasia Registry (ISDR)
     

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


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

  • 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

  • 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) is a catalog of human genes and genetic disorders. Each entry has 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 Metaphyseal chondrodysplasia Schmid type. Click on the link to view a sample search on this topic.

Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.


  1. Briggs, Michael. Metaphyseal Chondrodysplasia, Schmid Type. National Organization for Rare Disorders. 2016; https://rarediseases.org/rare-diseases/metaphyseal-chondrodysplasia-schmid-type/.
  2. Metaphyseal Chondrodysplasia, Schmid Type; MCDS. Online Mendelian Inheritance in Man. August, 2016; https://www.omim.org/entry/156500.
  3. Le Merrer, Martine. Metaphyseal chondrodysplasia, Schmid type. Orphanet. November, 2008; http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=174.