Trigeminal neuralgia caused by an underlying disease. Clinical examination shows sensory changes in a significant proportion of these patients.
- Recurrent paroxysms of unilateral facial pain fulfilling criteria for 13.1.1 Trigeminal neuralgia, either purely paroxysmal or associated with concomitant continuous or near-continuous pain
- An underlying disease has been demonstrated that is known to be able to cause, and explaining, the neuralgia1
- Not better accounted for by another ICHD-3 diagnosis2.
- Recognized causes are tumour in the cerebellopontine angle, AV-malformation and multiple sclerosis.
- MRI is best equipped to detect an underlying cause for 18.104.22.168 Secondary trigeminal neuralgia, Other investigations may include neurophysiological recording of trigeminal reflexes and trigeminal evoked potentials, suitable for patients who cannot undergo MRI.