How is trigeminal neuralgia (TN) differentiated from paroxysmal hemicrania syndromes?

Updated: Jul 11, 2019
  • Author: Manish K Singh, MD; Chief Editor: Robert A Egan, MD  more...
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Answer

Paroxysmal hemicrania syndromes

According to Goadsby and Lipton, similar to trigeminal neuralgia, paroxysmal hemicrania syndromes typically last only seconds, however, the latter syndromes occur in and around 1 eye. [21] Intense unilateral conjunctival injection and lacrimation signal an autonomic component, which further distinguishes paroxysmal hemicrania syndromes. Another feature is that paroxysmal hemicrania syndromes do not respond to carbamazepine.


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