Differential diagnosis of muscular hypotonia in infants: The kyphoscoliotic type of Ehlers-Danlos syndrome (EDS VI)

YİŞ U., Dirik E., Chambaz C., Steinmann B., Giunta C.

NEUROMUSCULAR DISORDERS, vol.18, no.3, pp.210-214, 2008 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1016/j.nmd.2007.11.006
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.210-214
  • Keywords: infant, hypotonia, scoliosis, Ehlers-Danlos syndrome, DIFFERENT PHENOTYPES, GENE, MUTATION
  • Dokuz Eylül University Affiliated: Yes


The kyphoscoliotic type of Ehlers-Danlos syndrome (EDS VI) (OMIM 225400) is an inherited connective tissue disorder characterized by hypotonia and kyphoscoliosis at birth, joint hypermobility, and skin hyperelasticity and fragility. Biochemically, it is characterized by a deficiency of collagen lysyl hydroxylase (EC due to mutations in PLOD]. This deficiency results in underhydroxylation of collagen lysyl residues and, hence, an abnormal pattern of lysyl pyridinoline (LP) and hydroxylysyl pyridinoline (HP) crosslinks excreted in the urine. Because of hypotonia and delay in gross motor development, a neuromuscular disease is usually suspected, and in most cases the diagnosis is considered only very late, after performing an invasive neuromuscular work-up with normal results.