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Yeltay Rakhmanov, Paolo Enrico Maltese, Carla Marinelli, Marco Castori, Tommaso Beccari, Munis Dundar and Matteo Bertelli

Abstract

Marfan syndrome (MFS) is an inherited connective tissue disorder caused by heterozygous mutations in the FBN1 gene. Clinical manifestations of MFS include aortic dilatation and dissection, as well as cardiac valvular, ocular, skeletal and neurological manifestations. Prevalence varies from 6 to 20 per 100,000 individuals. Revised Ghent Nosology (2010) is used to establish a clinically based suspected diagnosis to be confirmed by molecular testing. This Utility Gene Test was prepared on the basis of an analysis of the literature and existing diagnostic protocols. Molecular testing is useful for diagnosis confirmation, as well as differential diagnosis, appropriate genetic counselling and access to clinical trials.

Open access

Yeltay Rakhmanov, Paolo Enrico Maltese, Alice Bruson, Marco Castori, Tommaso Beccari, Munis Dundar and Matteo Bertelli

Abstract

Ehlers-Danlos syndrome (EDS) is an umbrella term for various inherited connective tissue disorders associated with mutations in genes involved in extracellular matrix formation. “The 2017 International Classification of Ehlers-Danlos Syndromes and related disorders” identifies 13 clinical types with mutations in 19 distinct genes. The present module focuses on forms with major vascular involvement: vascular EDS (vEDS) caused by heterozygous mutations in COL3A1, “vascular-like” EDS (vlEDS) caused by recurrent mutations in COL1A1, classical EDS with vascular fragility associated with heterozygous mutations in COL5A1, and kyphoscoliotic EDS associated with recessive variations in PLOD1 and FKBP14. The overall prevalence of EDS is estimated between 1/10,000 and 1/25,000 and vEDS accounts for about 5 to 10% of all EDS cases. This Utility Gene Test was prepared on the basis of an analysis of the literature and existing diagnostic protocols. Molecular testing is useful for diagnosis confirmation, as well as differential diagnosis, appropriate genetic counselling and access to clinical trials.

Open access

Yeltay Rakhmanov, Paolo Enrico Maltese, Stefano Paolacci, Carla Marinelli, Marco Castori, Tommaso Beccari, Munis Dundar and Matteo Bertelli

Abstract

Marfan-like disorders are inherited conditions with features resembling Marfan syndrome but without a pathogenic variant in FBN1, and/or without a clinical diagnosis of Marfan syndrome according to the Revised Ghent criteria, and/or with a pathogenic variant in a different disease gene. Marfan-like disorders are clinically and genetically heterogeneous and have variable prognosis. They may have autosomal dominant or autosomal recessive patterns of inheritance. The prevalence of most Marfan-like disorders is unknown. This Utility Gene Test was prepared on the basis of an analysis of the literature and existing diagnostic protocols. Molecular testing is useful for diagnosis confirmation, as well as differential diagnosis, appropriate genetic counselling and access to clinical trials.