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A heterogeneous group of diseases characterized by fragility of the soft connective tissues resulting in widespread skin, ligament, joint, blood vessel and/or internal organ manifestations. Clinical spectrum is highly variable, ranging from mild skin and joint hyperlaxity to severe physical disability and life-threatening vascular complications. Overlap with osteogenesis imperfecta may be observed resulting in an EDS/osteogenesis imperfecta overlap phenotype. Diseases in this group include classical Ehlers-Danlos syndrome (EDS), musculocontractural EDS, hypermobile EDS, vascular EDS, arthrochalasia EDS, dermatosparaxis EDS, periodontal EDS, X-linked EDS, brittle cornea syndrome, classical-like EDS type 1 and type 2, cardiac-valvular EDS, spondylodysplastic EDS, myopathic EDS, and kyphoscoliotic EDS.