Focal myopathy as a cause of anterocollis in Parkinsonism.
We present a patient with levodopa-responsive Parkinsonism who developed disproportionate anterocollis over a period of 4 to 5 weeks. A neurological evaluation, including EMG and muscle biopsy, demonstrated the presence of a focal myopathy typical of the so-called "dropped head syndrome" or "isolated neck extensor myopathy." Parkinsonian patients presenting with disproportionate anterocollis should be evaluated for focal myopathy, as this may represent one possible cause.
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Albany Medical College, Department of Neurology, Albany, New York, USA.
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D000368:Aged; D001706:Biopsy; D003937:Diagnosis, Differential; D020821:Dystonic Disorders / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D019578:Multiple System Atrophy / Q000175:diagnosis* / Q000473:pathology; D009334:Neck Muscles / Q000473:pathology; D009460:Neurologic Examination; D010300:Parkinson Disease / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology
D007980:Levodopa