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- W4241449635 abstract "Abstract Abstract Background: Myofibrillar myopathies (MFMs) are a genetically heterogeneous group of muscle disorders. Mutations in the filamin C gene (FLNC) have previously been identified in patients with MFM. The phenotypes of FLNC-related MFM are heterogeneous. Case presentation: The patient was a 37-year-old male who first experienced weakness in the distal muscles of his hand, which eventually spread to the lower limbs and proximal muscles. Serum creatine kinase levels were moderately elevated. Obvious neuropathic changes in the electromyographic exam and edema changes in lower distal limb magnetic resonance imaging were observed. Histopathological examination revealed the presence of abnormal protein aggregates and angular atrophy in some muscle fibers. Ultrastructural analysis showed inordinate myofibrillar structures and dissolved myofilaments. DNA sequencing analysis detected a heterozygous missense mutation (c.7123G>A, p.V2375I) in the immunoglobulin (Ig)-like domain 21 of FLNC. Conclusions: FLNC mutation c.7123G>A, p.V2375I in the immunoglobulin (Ig)-like domain 21 can be associated with distal myopathy with typical MFM features and lower motor neuron syndrome. Although electromyographic examination of our patient showed obvious neuropathic changes, MFM could not be excluded. Therefore, genetic testing is necessary to make an accurate diagnosis. Key words: Filamin C gene, Myofibrillar myopathy, Distal myopathy, Missense mutation, Lower motor neuron" @default.
- W4241449635 created "2022-05-12" @default.
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- W4241449635 date "2019-08-06" @default.
- W4241449635 modified "2023-09-27" @default.
- W4241449635 title "A mutation in the filamin c gene causes myofibrillar myopathy with lower motor neuron syndrome: a case report" @default.
- W4241449635 doi "https://doi.org/10.21203/rs.2.348/v4" @default.
- W4241449635 hasPublicationYear "2019" @default.
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