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Related Experiment Video

Updated: Jun 1, 2026

Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation

Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation

Published on: December 18, 2015

[An uncommon reason for facial hypoesthesia].

M N Stienen¹, M A Seule, J Weber

¹Klinik für Neurochirurgie, Kantonsspital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen. martin.stienen@kssg.ch

|May 27, 2011

Summary

A vertebral artery aneurysm compressing the trigeminal nerve caused facial numbness. Endovascular treatment was successful, leading to full recovery despite a stroke in the left posterior inferior cerebellar artery territory.

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Last Updated: Jun 1, 2026

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Published on: March 1, 2015

Area of Science:

Neurology
Neurosurgery
Vascular Medicine

Background:

Facial hypoesthesia can be caused by neurovascular compression.
Vertebral artery aneurysms are rare but serious conditions.
Trigeminal nerve compression can lead to significant neurological deficits.

Observation:

A 58-year-old female presented with progressive left-sided facial hypoesthesia.
MRI revealed a 20 mm left vertebral artery aneurysm compressing the trigeminal nerve.
The left posterior inferior cerebellar artery (PICA) originated from the aneurysmal sac.

Findings:

Endovascular occlusion using coiling and a flow-diverter was performed.
The patient experienced an extensive infarction in the left PICA territory post-procedure.
Despite the infarction, the patient achieved a complete recovery at 4 weeks.

Implications:

Endovascular treatment is a viable option for vertebral artery aneurysms causing trigeminal neuralgia.
Aggressive treatment can lead to favorable outcomes even with complications like territorial infarction.
This case highlights the importance of early diagnosis and intervention for neurovascular compression syndromes.