Tumor associated trigeminal neuralgia
Trigeminal neuralgia as the initial manifestation of temporal glioma 14).
A supratentorial tumor can initiate TN even without a direct involvement of the trigeminal ganglion or nerve. Such tumors may lead to increased intracranial pressure and brain shift generating a pressure cone that distorts the brain stemand displaces an adjacent vessel, compressing the trigeminal nerve root.
Another explanatory mechanism in a patient with supratentorial tumor and hydrocephalus can be that pressure over the trigeminal sensory root rather than stretching of the nerve fiber leads to TN 15).