Mutations of the fibrillin-1 (FBN1) gene on chromosome 15 have been described in patients with classical Marfan syndrome (MFS), neonatal MFS, the "MASS" phenotype, autosomal dominant ascending aortic aneurysms, autosomal dominant ectopia lentis (EL), Marfanoid skeletal features [Milewicz et al., 1995: J Clin Invest 95:2373-2378], familial arachnodactyly, Shprintzen-Goldberg syndrome [Hayward et al., 1994: Mol Cell Probes 8:325-327; Furthmayr and Francke, 1997: Semin Thorac Cardiovasc Surg 9:191-205], and severe progressive kyphoscoliosis [Adès et al., 2002: Am J Med Genet 109:261-270].
To our knowledge, this is the first report of a family with an FBN1 gene mutation cosegregating with an unusual autosomal dominant progressive kyphoscoliosis of variable severity, together with radiological abnormalities of the spine, and some skeletal but no ocular or cardiac manifestations of Marfan syndrome.
We retrospectively reviewed a case of proximal junctional kyphosis after posterior spinal fusion for severe kyphoscoliosis in PIEZO2-deficient arthrogryposis.
Horstick et al.(2013) previously reported a homozygous p.Trp284Ser variant in STAC3 as the cause of Native American myopathy (NAM) in 5 Lumbee Native American families with congenital hypotonia and weakness, cleft palate, short stature, ptosis, kyphoscoliosis, talipes deformities, and susceptibility to malignant hyperthermia (MH).
Biallelic mutations in FKBP14 cause a recessive form of Ehlers-Danlos syndrome (EDS) characterized by progressive kyphoscoliosis, myopathy, and hearing loss.