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  • Title: [Isolated trigeminal sensory neuropathy due to pontine infarction of the root entry zone--report of two cases].
    Author: Kinoshita Y, Harada A, Yasukouchi H, Tsuru E, Okudera T.
    Journal: Brain Nerve; 2008 Feb; 60(2):175-9. PubMed ID: 18306666.
    Abstract:
    Secondary trigeminal neuralgia and isolated trigeminal neuropathy due to ischemic lesion of the pons are very rare. We report 2 patients with pontine infarct transecting the central trigeminal pathways resulting in trigeminal neuropathy and/or neuralgia. Case 1: A 48-year-old female presented with lancinating pain and paresthesia and hypesthesia in the right V2 and V3 distributions. Magnetic resonance imaging (MRI) of the brain demonstrated a wedge-shaped infarct at the root entry zone (REZ) of the right trigeminal nerve in the pons. Case 2: A 66-year-old female presented with paresthesia and hypesthesia in the right V1, V2 and V3 distributions. MRI demonstrated a small wedge-shaped infarct at REZ. This infarction of the REZ may have led to produce the isolated trigeminal neuralgia and trigeminal neuropathy.
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