What are atypical features of cluster headache (CH)?

Updated: Jun 07, 2019
  • Author: Michelle Blanda, MD; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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Structural lesions have been described with CH and should be suspected if the presentation is atypical. Atypical features may include the following:

  • Absence of a periodic pattern

  • Residual headache between exacerbations

  • Bilaterality

  • Incomplete or minimal response to standard therapy

  • Presence of lateralizing findings on examination (other than Horner syndrome)

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