Vestibular Schwannoma may Compress Both Trigeminal and Vestibulocochlear Nerves: Case Report Finds
A recent case report shows a rare clinical case with a vestibular schwannoma simultaneously compressing both the trigeminal and vestibulocochlear nerves.
These findings of the case report published in the Indian Journal of Otology in May 2026 by Deivanayagi Muthusamy and team of the Department of Oral Medicine and Radiology, Adhiparasakthi Dental College and Hospital, The Tamil Nadu Dr. M. G. R. Medical University.
Clinical Case Overview
A 92-year-old male presenting with progressive hearing loss and electric-shock-like left jaw pain was diagnosed via MRI with a 2.4 cm left vestibular schwannoma mimicking dental pathology. The patient was started on pregabalin 75 mg daily and admitted for multidisciplinary neuro-otological management.
Mechanistically, vestibular schwannomas are benign tumors arising from Schwann cells, representing the most common lesions of the cerebellopontine angle. While they typically present with auditory or vestibular deficits, trigeminal nerve involvement is documented in only 1% to 3% of classical series, though this incidence rises to 27% in cases with direct nerve contact. The compression of both cranial nerves five and eight represents a "two-hit" neuropathic phenomenon. The tumor can trigger trigeminal neuralgia through direct mechanical compression, demyelination, altered axonal conduction, or secondary neurovascular displacement of adjacent vessels against the nerve root entry zone.
Implications for Clinicians
In geriatric medicine, new-onset facial pain or trigeminal neuralgia is frequently misattributed to routine dental or vascular pathologies. This diagnostic bias leads to a misdiagnosis rate exceeding 40% and an average diagnostic delay of seven months. When facial neuralgia coexists with progressive hearing deficits, clinicians must maintain high suspicion for intracranial masses. High-resolution magnetic resonance imaging remains the diagnostic gold standard. Management in advanced age requires balancing intervention risks against quality of life; conservative 'wait-and-scan' strategies or stereotactic radiosurgery are often preferred over microsurgery in frail nonagenarians.
Reference
Muthusamy, D., Chandran, N., Ramalingam, M., & Elamparithi, B. (2026). Dual nerve compression in a nonagenarian: A case of vestibular schwannoma with trigeminal neuralgia. Indian Journal of Otology, 32(3), 190-192.
