What is familial hemiplegic migraine (FHM)?

Updated: Oct 21, 2019
  • Author: Jasvinder Chawla, MD, MBA; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Familial hemiplegic migraine (FHM) is a rare type of migraine with aura that is preceded or followed by hemiplegia, which typically resolves. FHM may be associated with cerebellar ataxia, which is also linked to the 19p locus. Evidence suggests that the 19p locus for FHM may also be involved in patients with other forms of migraine. Three genes have thus far been identified as being causative for FHM.


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