[An uncommon reason for facial hypoesthesia]
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Updated: Jun 1, 2026

Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation
Published on: December 18, 2015
M N Stienen1, M A Seule, J Weber
1Klinik für Neurochirurgie, Kantonsspital St. Gallen, Rorschacher Strasse 95, 9007 St. Gallen. martin.stienen@kssg.ch
Abstract:
A 58-year-old female admitted herself to the emergency department with progressive left-sided facial hypoesthesia. Magnetic resonance imaging revealed a 20 mm-sized aneurysm of the left vertebral artery leading to compression of the trigeminal nerve. An endovascular occlusion with a combined coiling and flow-diverter was performed. The left posterior inferior cerebellar artery (PICA) arised from the aneurysmal sac. Despite an extensive infarction of the left PICA-territory, the patient convalesced well and presented completely independent and without symptoms at the 4-week follow-up.
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