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KMID : 0361420070310010113
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Journal of Korean Academy of Rehabilitation Medicine
2007 Volume.31 No. 1 p.113 ~ p.118
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A Case of Type III Proximal Spinal Muscular Atrophy Distinguished from Distal Spinal Muscular Atrophy: A case report
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Kim Hyoung-Seop
Lee Sang-Chul
Cho Soo-Kyung
Park Yong-Bum
Lee Soo-Hyun
Moon Jae-Ho
Park Yoon-Ghil
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Abstract
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Spinal muscular atrophy (SMA) is a neuromuscular disorder characterized by progressive anterior horn cell degeneration leading to motor weakness, muscular atrophy and denervation. Recently, the genes responsible for proximal muscular atrophy have been identified and named as survivor motor neuron (SMN) and neuronal apoptosis inhibitory protein genes. The clinical symptoms, courses and evaluation findings of proximal SMA type III are similar to those of distal SMA and proximal muscle myopathies such as limb gir-dle muscular dystrophy and fascioscapulohumeral muscular dystrophy. It cannot be diagnosed with muscle biopsy and electromyographic findings exclusively. In our case, the patient showed similar clinical manifestations of distal SMA. So we couldn’t diagnose this case as SMA type III until we detected SMN 1 gene deletion. This case could be a good model for diagnostic approach to SMA type III and differential diagnosis to similar diseases.
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KEYWORD
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Motor neuron disease, Proximal Spinal Muscular Type III, Survivor motor neuron gene
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