Document Detail

A case of painful hemimasticatory spasm with masseter muscle hypertrophy responsive to botulinum toxin.
MedLine Citation:
PMID:  24868368     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Hemimasticatory spasm (HMS) is a rare disorder of the trigeminal nerve characterized by paroxysmal involuntary contractions of the unilateral jaw-closing muscles. HMS has been frequently described in association with facial hemiatrophy or localized scleroderma. A 42-year-old female presented with involuntary paroxysmal spasms of the left face, of 6 months duration. Her lower face on the left was markedly hypertrophied without skin lesions. An electrophysiological study indicated that the masseter reflexes and masseteric silent period were attenuated on the affected side. Surface electromyography demonstrated irregular bursts of motor unit potentials at high frequencies up to 200 Hz. Magnetic resonance imaging of the head showed marked hypertrophy of the left masseter muscle. Biopsy of the hypertrophied masseter muscle was normal. Repeated local injections of botulinum toxin noticeably reduced the size of the hypertrophied muscle as well as improved the patient's symptoms.
Jin-Hyuck Kim; Seok-Won Han; Yun Joong Kim; Jooyong Kim; Mi-Suh Oh; Hyeo-Il Ma; Byung-Chul Lee
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Publication Detail:
Type:  Journal Article     Date:  2009-10-30
Journal Detail:
Title:  Journal of movement disorders     Volume:  2     ISSN:  2005-940X     ISO Abbreviation:  J Mov Disord     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2014-05-28     Completed Date:  2014-05-28     Revised Date:  2014-06-04    
Medline Journal Info:
Nlm Unique ID:  101527867     Medline TA:  J Mov Disord     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  95-7     Citation Subset:  -    
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