Morvan syndrome

Morvan syndrome, also known as Morvan fibrillary chorea, is a rare syndrome thought to be either paraneoplastic or autoimmune in origin.

Clinical presentation

It is characterized by:

  • neuromyotonia
  • pain
  • hyperhydrosis
  • weight loss
  • severe insomnia
  • hallucinations


Voltage gated potassium channel (VGKC) antibodies are frequently present in this syndrome.

History and etymology

The condition is named after the French physician, Augustin Marie Morvan (1819-1897) who first described it in 1890 3,4.

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Article information

rID: 20036
Section: Syndromes
Synonyms or Alternate Spellings:
  • Morvan fibrillary chorea
  • Morvan's fibrillary chorea
  • Morvan's syndrome

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