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KMID : 0860920110130010044
Journal of the Korean Association EMG-Electrodiagnostic Medicine
2011 Volume.13 No. 1 p.44 ~ p.48
A Stiff-Person Syndrome Misdiagnosed as Parkinson Syndrome in a Patient with Cerebral Palsy - A Case Report -
Park Tae-Hyung

Kim Jong-Moon
Choi Young-Chil
Lee Jun-Ho
Abstract
Stiff-person syndrome (SPS) or Stiff-man syndrome (SMS) is a rare disorder characterized by progressive
muscle rigidity with painful spasm of axial and limb muscles causing impairment of voluntary movements
which precipitated by generally non-provocative stimulations such as tactile, auditory or emotional
stimulations. This symptoms might resembling chronic form of tetanus and can be misdiagnosed as
Parkinson¡¯s syndrome, multiple sclerosis, fibromyalgia, psychosomatic illness, or anxiety and phobia. A
definitive diagnosis can be made with a serologic test that measures the level of glutamic acid decarboxylase
(GAD) antibodies in the blood and electromyographic findings.
In our case, we present a cerebral palsy patient with SPS which was misdiagnosed as Parkinson¡¯s disease
at first impression.
KEYWORD
Stiff-person syndrome , Parkinson¡¯s disease , Glutamic acid decarboxylase (GAD) antibodies
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