Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
CASE REPORTS
Spinal Muscular Atrophy Type 3 Showing a Specific Pattern of Selective Vulnerability on Muscle Ultrasound
Ryutaro NakamuraAkihiro KitamuraTakahito TsukamotoYuhei OtowaNaoki OkamotoNobuhiro OgawaIsamu YamakawaHyoh KimMitsuru SanadaMakoto Urushitani
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ジャーナル オープンアクセス

2021 年 60 巻 12 号 p. 1935-1939

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A 23-year-old woman was admitted for slowly progressive proximal limb muscle weakness from childhood with elevated muscle enzyme levels. Although muscular diseases were suspected, an electromyogram showed remarkable neurogenic changes, and a muscle echogram indicated selective muscle involvement, including dissociation between the soleus and gastrocnemius, which was consistent with previous reports using magnetic resonance imaging (MRI). She was diagnosed with SMA type 3 following genetic testing, and nusinersen was soon initiated. An early diagnosis is mandatory to maximize the benefit of treatment. A muscle echogram may facilitate an early diagnosis in a non-invasive and time-saving manner compared to MRI.

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© 2021 by The Japanese Society of Internal Medicine
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