Trigeminal neuralgia caused by contact between the affected trigeminal nerve and a space-occupying lesion.
- Recurrent paroxysms of unilateral facial pain fulfilling criteria for 13.1.1 Trigeminal neuralgia
- Both of the following:
- a space-occupying lesion in contact with the affected trigeminal nerve has been demonstrated
- pain has developed after identification of the lesion, or led to its discovery
- Not better accounted for by another ICHD-3 diagnosis.
Patients with 18.104.22.168.2 Trigeminal neuralgia attributed to space-occupying lesion may or may not have clinically detectable sensory signs, while electrophysiological tests such as trigeminal brainstem reflexes show abnormalities in nearly all cases.