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A new de novo missense mutation in MYH2 expands clinical and genetic findings in hereditary myosin myopathies.

Research paper by A A D'Amico, F F Fattori, E E Bellacchio, M M Catteruccia, S S Servidei, E E Bertini

Indexed on: 16 Mar '13Published on: 16 Mar '13Published in: Neuromuscular Disorders



Abstract

Congenital myopathy related to mutations in myosin MyHC IIa gene (MYH2) is a rare neuromuscular disease. A single dominant missense mutation has been reported so far in a family in which the affected members had congenital joint contractures at birth, external ophthalmoplegia and proximal muscle weakness. Afterward only additional 4 recessive mutations have been identified in 5 patients presenting a mild non-progressive early-onset myopathy associated with ophthalmoparesis. We report a new de novo MYH2 missense mutation in a baby affected by a congenital myopathy characterized by severe dysphagia, respiratory distress at birth and external ophthalmoplegia. We describe clinical, histopathological and muscle imaging findings expanding the clinical and genetic spectrum of MYH2-related myopathy.