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KMID : 0860920180200010029
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2018 Volume.20 No. 1 p.29 ~ p.32
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A Case of Dropped Head Syndrome Caused by Focal Myositis
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Cho Jeong-Hee
Kim Gyu-Sik
Kim Jong-Hun
Lee Jun-Hong
Lee Ji-Eun
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Abstract
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Dropped head syndrome is characterized by restricted weakness of the extensors of the neck. It can be caused by many neuromuscular disorders. We present a case of dropped head syndrome by focal myositis. A 73-year-old man had a difficulty in maintaining an erect posture of his neck and lifting his chin off the chest. These symptoms developed gradually over 11 months. The EMG of the bilateral cervical paraspinal muscles demonstrated fibrillation potentials and positive sharp waves. The MRI revealed a diffuse edema of the neck extensor muscles on T2-weighted images and gadolinium enhancement. The neck extensor weakness improved significantly after treatment of steroids. Dropped head syndrome is a rare condition and in a subgroup of patients it is caused by a focal myositis. The findings of EMG and MRI can give us make a diagnosis of focal myositis and be a rationale for use of steroids.
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KEYWORD
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dropped head syndrome, myositis
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