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        Genomics Precision Diagnostic > Skeletal > Skeletal Osteogenesis Imperfecta

        Osteogenesis Imperfecta

        Osteogenesis Imperfecta (OI) is a disorder of bone fragility caused generally by mutations in the COL1A1 and COL1A2 genes that encode type I collagen. 
        Overview
        Indication
        Clinical Utility
        Genes & Diseases
        Methodology
        References

        Overview

        • Osteogenesis Imperfecta (OI) is a disorder of bone fragility caused generally by mutations in the COL1A1 and COL1A2 genes that encode type I collagen. OI is one of the most common skeletal dysplasias. It is a generalized disease that is phenotypically and molecularly heterogeneous manifesting with a broad array of signs and symptoms including connective tissue and systemic manifestations in addition to bone fragility. 

        • The more prevalent autosomal dominant forms of osteogenesis imperfecta are caused by primary defects in type 1 collagen, whereas autosomal recessive forms are caused by deficiency of proteins which interact with type 1 procollagen. There are at least 8 different types of the disease based on the inheritance. The differential diagnosis of OI includes child abuse, rickets, osteomalacia and other rare skeletal syndromes.  

        • The Igenomix Osteogenesis Imperfecta Precision Panel can be used to make a directed and accurate differential diagnosis of bone fragility ultimately leading to a better management and prognosis of the disease. It provides a comprehensive analysis of the genes involved in this disease using next-generation sequencing (NGS) to fully understand the spectrum of relevant genes involved.  

        Indication

        The Igenomix Osteogenesis Imperfecta Precision Panel is indicated for those patients with a suspected clinical diagnosis of osteogenesis imperfecta presenting with the following manifestations: 

        • Blue sclerae 
        • Triangular facies 
        • Macrocephaly 
        • Hearing loss 
        • Defective dentition 
        • Barrel chest 
        • Scoliosis 
        • Limb deformities 
        • Pregnancy ultrasound: Limb-length abnormalities at 15-18 weeks’ gestation, decreased mineralization of calvaria, bowing of the long bones, multiple rib fractures 
        • Fractures 
        • Joint laxity 
        • Growth retardation 

        Clinical Utility

        The clinical utility of this panel is: 

        • The genetic and molecular confirmation for an accurate clinical diagnosis of a symptomatic patient.  
        • Early initiation of treatment with a multidisciplinary team, encompassing physical rehabilitation and surgical procedures, management of hearing, dental and pulmonary abnormalities, as well as drugs, such as bisphosphonates and recombinant human growth hormone.  
        • Prenatal detection of osteogenesis imperfecta for a directed obstetric and perinatal treatment of affected infants. 
        • Combining phenotypic and genotypic data to improve diagnostic rate of these patients in the target population.  
        • Risk assessment of asymptomatic family members according to the mode of inheritance

        Genes & Diseases

        Methodology

        References

        See scientific referrals

        Pauli, R. (2019). Achondroplasia: a comprehensive clinical review. Orphanet Journal Of Rare Diseases, 14(1). doi: 10.1186/s13023-018-0972-6 

        Horton, W., Hall, J., & Hecht, J. (2007). Achondroplasia. The Lancet, 370(9582), 162-172. doi: 10.1016/s0140-6736(07)61090-3 

        Baitner, A., Maurer, S., Gruen, M., & Di Cesare, P. (2000). The Genetic Basis of the Osteochondrodysplasias. Journal Of Pediatric Orthopaedics, 594-605. doi: 10.1097/00004694-200009000-00010 

        Ornitz, D. M., & Legeai-Mallet, L. (2017). Achondroplasia: Development, pathogenesis, and therapy. Developmental dynamics : an official publication of the American Association of Anatomists, 246(4), 291–309. https://doi.org/10.1002/dvdy.24479 

        Daugherty A. (2017). Achondroplasia: Etiology, Clinical Presentation, and Management. Neonatal network : NN, 36(6), 337–342. https://doi.org/10.1891/0730-0832.36.6.337 

        Horton, W., Hall, J., & Hecht, J. (2007). Achondroplasia. The Lancet, 370(9582), 162-172. doi: 10.1016/s0140-6736(07)61090-3 

        Legare JM. Achondroplasia. 1998 Oct 12 [Updated 2020 Aug 6]. In: Adam MP, Ardinger HH, Pagon RA, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2021. Available from: https://www.ncbi.nlm.nih.gov/books/NBK1152/ 

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