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Congenital myopathies are a clinically and genetically heterogeneous group of disorders characterized by early onset hypotonia, weakness and characteristic, but not pathognomonic, structural abnormalities in muscle fibres. The clinical features overlap with muscular dystrophies, myofibrillar myopathies, neurogenic conditions and congenital myasthenic syndromes. We describe a case of cap myopathy with myasthenic features due to a mutation in the TPM2 gene that responded to anticholinesterase therapy. We also review other published cases of congenital myopathies with neuromuscular transmission abnormalities. This report expands the spectrum of congenital myopathies with secondary neuromuscular transmission defects. The recognition of these cases is important since these conditions can benefit from treatment with drugs enhancing neuromuscular transmission.

Original publication

DOI

10.1016/j.nmd.2014.07.005

Type

Journal article

Journal

Neuromuscul Disord

Publication Date

12/2014

Volume

24

Pages

1103 - 1110

Keywords

Acetylcholine receptor, Acetylcholinesterase inhibitors, BIN1, Centronuclear myopathies, Congenital myasthenic syndromes, Congenital myopathies, DNM2, Fibre type disproportion, MTM1, Neuromuscular junction, Neuromuscular transmission, Plectinopathy, RYR1, TPM2, TPM3, Tropomyosin, Adolescent, Cholinesterase Inhibitors, Humans, Male, Muscle, Skeletal, Mutation, Myopathies, Structural, Congenital, Neuromuscular Junction Diseases, Tropomyosin