A novel pathogenic MYH3 mutation in a child with Sheldon–Hall syndrome and vertebral fusions

Marcello Scala, Andrea Accogli, Elisa De Grandis, Anna Allegri, Christoph P. Bagowski, Moneef Shoukier, Mohamad Maghnie, Valeria Capra

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Sheldon–Hall syndrome (SHS) is the most common of the distal arthrogryposes (DAs), a group of disorders characterized by congenital non-progressive contractures. Patients with SHS present with contractures of the limbs and a distinctive triangular facies with prominent nasolabial folds. Calcaneovalgus deformity is frequent, as well as camptodactyly and ulnar deviation. Causative mutations in at least four different genes have been reported (MYH3, TNNI2, TPM2, and TNNT3). MYH3 plays a pivotal role in fetal muscle development and mutations in this gene are associated with Freeman–Sheldon syndrome, distal arthrogryposis 8 (DA8), and autosomal dominant spondylocarpotarsal synostosis. The last two disorders are characterized by skeletal abnormalities, in particular bony fusions. The observation that MYH3 may be mutated in these syndromes has suggested the involvement of this gene in bone development. We report the case of a boy with a novel pathogenic MYH3 mutation, presenting with the classical clinical features of SHS in association with unilateral carpal bone fusion and multiple vertebral fusions. This distinctive phenotype has never been reported in the literature so far and expands the phenotypic spectrum of SHS, endorsing the clinical variability of patients with MYH3-related disorders. Our findings also support a role for MYH3 in both muscle and bone development, suggesting a phenotypic continuum in MYH3-related disorders.

Original languageEnglish
Pages (from-to)663-667
Number of pages5
JournalAmerican Journal of Medical Genetics, Part A
Volume176
Issue number3
DOIs
Publication statusPublished - Mar 1 2018

Fingerprint

Mutation
Arthrogryposis
Muscle Development
Bone Development
Contracture
Nasolabial Fold
Carpal Bones
Genes
Congenital, Hereditary, and Neonatal Diseases and Abnormalities
Fetal Development
Extremities
Phenotype

Keywords

  • arthrogryposis
  • embryonic myosin heavy chain
  • Sheldon–Hall syndrome
  • vertebral fusions

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

A novel pathogenic MYH3 mutation in a child with Sheldon–Hall syndrome and vertebral fusions. / Scala, Marcello; Accogli, Andrea; De Grandis, Elisa; Allegri, Anna; Bagowski, Christoph P.; Shoukier, Moneef; Maghnie, Mohamad; Capra, Valeria.

In: American Journal of Medical Genetics, Part A, Vol. 176, No. 3, 01.03.2018, p. 663-667.

Research output: Contribution to journalArticle

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