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Disease Profile

Osteogenesis imperfecta type VI

Prevalence
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.

Unknown

Age of onset

#N/A

ICD-10

#N/A

Inheritance

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

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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

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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.

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

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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.

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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.

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Not applicable

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Other names (AKA)

OI type 6; OI6; OI type VI;

Categories

Congenital and Genetic Diseases; Mouth Diseases; Musculoskeletal Diseases

Summary

Osteogenesis imperfecta type 6 is a form of osteogenesis imperfecta which results in weakened bones that breaks easily. When viewed under a microscope, bone tissue has a distinct "fish-scale" pattern. Individuals with osteogenesis imperfecta type 6 appear to be healthy at birth and do not have fractures until after 6 months of age. Osteogenesis imperfecta type 6 may be caused by mutations in the SERPINF1 gene and is inherited in an autosomal recessive pattern.[1][2][3]

Symptoms

Osteogenesis imperfecta type VI is a moderate to severe form of osteogenesis imperfecta that affects the bones but is distinctive in the bone characteristics at a microscopic level (histology). People with this condition have bones that are thin (osteopenia) and break easily beginning after 6 months of age. A defect in how the bone uses minerals to build and strengthen bone (mineralization) causes a distinct "fish-scale" pattern. Unlike other types of osteogenesis imperfecta, the whites of the eyes (sclerae) and teeth do not appear to be affected.[1][4]

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
Percent of people who have these symptoms is not available through HPO
Autosomal recessive inheritance
0000007
Beaking of vertebral bodies
0004568
Biconcave vertebral bodies
0004586
Coxa vara
0002812
Increased susceptibility to fractures
Abnormal susceptibility to fractures
Bone fragility
Frequent broken bones
Increased bone fragility
Increased tendency to fractures

[ more ]

0002659
Joint laxity
Joint instability
Lax joints
Loose-jointedness
Loosejointedness

[ more ]

0001388
Protrusio acetabuli
0003179
Vertebral compression fractures
Compression fracture
0002953

Diagnosis

Genetic testing is available for individuals with osteogenesis imperfecta. The rate for detecting mutations in the genes that are responsible for OI varies depending on the type.[5] Carrier testing may be available to relatives of affected individuals if the type of OI, disease-causing gene, and specific mutation in the affected individual are known.

Prenatal testing for at-risk pregnancies can be performed by analysis of collagen made by fetal cells obtained by chorionic villus sampling (CVS) at about ten to 12 weeks' gestation if an abnormality of collagen has been identified in cells from the affected individual. Analysis of collagen after an amniocentesis (usually performed at 15-20 weeks gestation) is not useful, because the cells obtained do not produce type I collagen. However, prenatal testing can be performed by analyzing the genes (molecular genetic testing) if the specific mutation has been identified in the affected relative.[5]

GeneTests lists the names of laboratories that are performing genetic testing for different types of osteogenesis imperfecta. To view the contact information for the clinical laboratories conducting testing, click here and click on "Testing" next to the type of OI in which you are interested. Please note that most of the laboratories listed through GeneTests do not accept direct contact from patients and their families; therefore, if you are interested in learning more, you will need to work with a health care provider or genetics professional. Genetics professionals, such as genetic counselors, can also explain the inheritance of OI in detail including information about genetic risks to specific family members.

Treatment

The resources below provide information about treatment options for this condition. If you have questions about which treatment is right for you, talk to your healthcare professional.

Management Guidelines

  • Orphanet Emergency Guidelines is an article which is expert-authored and peer-reviewed that is intended to guide health care professionals in emergency situations involving this condition.
  • Project OrphanAnesthesia is a project whose aim is to create peer-reviewed, readily accessible guidelines for patients with rare diseases and for the anesthesiologists caring for them. The project is a collaborative effort of the German Society of Anesthesiology and Intensive Care, Orphanet, the European Society of Pediatric Anesthesia, anesthetists and rare disease experts with the aim to contribute to patient safety.

    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

      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

      • The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) support research into the causes, treatment, and prevention of arthritis and musculoskeletal and skin diseases, the training of basic and clinical scientists to carry out this research, and the dissemination of information on research progress in these diseases. Click on the link to view information on this topic.

        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. 
        • PubMed is a searchable database of medical literature and lists journal articles that discuss Osteogenesis imperfecta type VI. Click on the link to view a sample search on this topic.

          References

          1. Homan E, et al. Mutations in SERPINF1 Cause Osteogenesis. Journal of Bone and Mineral Research. November 21, 2011; 26:2798-2803. https://onlinelibrary.wiley.com/doi/10.1002/jbmr.487/abstract. Accessed 3/27/2012.
          2. Osteogenesis Imperfecta, Type VI. Online Mendelian Inheritance in Man. February 2, 2012; https://omim.org/entry/613982. Accessed 3/28/2012.
          3. Becker J, et al. Exome Sequencing Identifies Truncating Mutations in Human SERPINF1 in Autosomal-Recessive Osteogensis Imperfecta. American Journal of Human Genetics. March 2011; 88(3):362-371. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3059418/. Accessed 3/28/2012.
          4. Glorieux F, et al. Osteogenesis Imperfecta Type VI: A Form of Brittle Bone Disease with a Mineralization Defect. Journal of Bone and Mineral Research. January 2002; https://onlinelibrary.wiley.com/doi/10.1359/jbmr.2002.17.1.30/full. Accessed 3/30/2012.
          5. Steiner RD, Pepin MG & Byers PH. COL1A1/2-Related Osteogenesis Imperfecta. GeneReviews. 2013; https://www.ncbi.nlm.nih.gov/books/NBK1295/.

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