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Disease Profile

Czech dysplasia metatarsal type

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.

<1 / 1 000 000

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


Other names (AKA)

Pseudorheumatoid dysplasia progressive, with hypoplastic toes


Congenital and Genetic Diseases; Musculoskeletal Diseases


The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.

Orpha Number: 137678

A rare, genetic, primary bone dysplasia disorder characterized by early-onset, progressive pseudorheumatoid arthritis, platyspondyly, and hypoplasia/dysplasia of the third and fourth metatarsals, in the absence of ophthalmologic, cleft palate, and height anomalies.

To date, fewer than 15 families have been reported worldwide.

Clinical description
The first clinical signs appearing in childhood are broad knees and flat nasal bridge, followed in late childhood and adolescence by short 3rd and 4th metatarsals (not always present), joint pain in knees and hips and later osteoarthritis of the spine, shoulder, hips, and knees. Shortening of the metacarpals may also be present. Vertebral abnormalities include mild platyspondyly, irregular end plates, and reduced intervertebral distances. Stature is within average range. Brachydactyly is restricted to metatarsals III, IV and, more variably, V. Progressive hearing loss may be associated and typically starts in early adulthood, although subclinical hearing impairment for high frequencies may be detected in children.

The disorder is due to the R275C mutation in the geneCOL2A1 (12q13.11).

Diagnostic methods
Disorder is suspected based on family history and clinical presentation, but this may be difficult to detect in early childhood. Skeletal radiographs showing platyspondyly and shortened metatarsals and metacarpals may be helpful in the diagnosis work up. Diagnosis is confirmed by genetic testing for the R275C mutation in COL2A1.

Differential diagnosis
Disorders with early-onset osteoarthritis and polyarticular arthritis form the main differential diagnoses and include juvenile idiopathic osteoarthritis and mild spondyloepiphyseal dysplasia due to COL2A1 mutation with early-onset osteoarthritis. Whilst COL2A1 mutations are involved in a spectrum of skeletal dysplasias, this specific disorder is typically distinguished by the absence of cleft palate, ophthalmologic pathology and short stature.

Antenatal diagnosis
Genetic prenatal diagnosis is possible when the mutation has been previously identified in a family member.

Genetic counseling
The pattern of inheritance is autosomal dominant. The risk of transmission to offspring is 50% and there is full disease penetrance.

Management and treatment
Treatment is symptomatic and frequently includes hip replacement (often by the age of 40), hearing aids for hearing loss, and anti-rheumatic medication for osteoarthritis. Appropriate surveillance of hearing loss and progression of osteoarthritis is required.

The disorder is associated with early-onset, progressive arthritis that is typically associated with significant joint pain and restricted mobility that can adversely impact quality of life. Early joint replacements are often recommended. Longevity does not appear to be different to that of the general population.

Visit the Orphanet disease page for more resources.


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:
Percent of people who have these symptoms is not available through HPO
Joint pain
Autosomal dominant inheritance
Coxa vara
Flat capital femoral epiphysis
Flat end part of innermost thighbone
Flexion contracture
Flexed joint that cannot be straightened
Growth abnormality
Abnormal growth
Growth issue

[ more ]

Intervertebral space narrowing
Irregular vertebral endplates
Narrow femoral neck
Narrow neck of thigh bone
Narrow iliac wings
Flattened vertebrae
Short femoral neck
Short neck of thighbone
Short metacarpal
Shortened long bone of hand
Short metatarsal
Short long bone of foot
Short toe
Short toes
Stubby toes

[ more ]

Thoracic kyphosis
Waddling gait
'Waddling' gait
Waddling walk

[ more ]



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.

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.

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 Czech dysplasia metatarsal type. Click on the link to view a sample search on this topic.