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Updated: Jun 27, 2026
Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
Surgical management of trigeminal schwannomas
Ricardo Ramina1, Tobias A Mattei, Marília G Sória
1Department of Neurosurgery, Instituto de Neurologia de Curitiba, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil.
Object:
The authors provide a detailed review of the surgical management of trigeminal schwannomas (TSs) and also discuss the best surgical approach based on the surgical anatomy and tumor extension.
Methods:
A series of 17 patients with TSs who were surgically treated between 1987 and 2008 at the authors' institution is reported. The lesions were small (< 3 cm) in 2, medium (between 3 and 4 cm) in 5, large (> 4 cm) in 6, and giant (> 5 cm) in 4 cases. Preoperative symptoms included trigeminal hypesthesia (53%), facial pain (53%), headaches (35.3%), hearing impairment (17.6%), seizures (17.6%), diplopia (11.8%), ataxia (11.8%), and hemiparesis and increased intracranial pressure with papilledema (5.9%). The mean follow-up duration was 10.5 years (121.6 months), with an average of 0.8 patients per year.
Results:
Total tumor excision was possible in 16 patients, with no surgery-related deaths. Postoperative trigeminal anesthesia was observed in 7; trigeminal motor function was preserved in 7. Two developed cerebrospinal fluid leakage, 2 presented with mild facial palsy, and 1 patient with neurofibromatosis Type 2 had recurrence of the tumor, which was uneventfully removed. Of the 9 who reported facial pain, only 1 remained symptomatic postoperatively.
Conclusions:
The best treatment for TSs is complete microsurgical removal. Postoperative preservation of trigeminal nerve function is possible when resection of the lesion is performed at well-established skull base neurosurgical centers. Although good results have been reported with radiosurgery, no cure can be obtained with this therapeutic modality. Instead, this treatment should be reserved only for nonresectable and residual tumors within the cavernous sinus.
Insights
Complete surgical removal is the best treatment for trigeminal schwannomas (TSs). Microsurgery at specialized centers maximizes trigeminal nerve function preservation and positive outcomes for these rare tumors.
Area of Science:
- Neurosurgery
- Skull Base Surgery
- Oncology
Background:
- Trigeminal schwannomas (TSs) are rare tumors requiring specialized surgical management.
- Understanding surgical anatomy and tumor extension is crucial for optimal treatment.
Purpose of the Study:
- To review the surgical management of trigeminal schwannomas (TSs).
- To determine the best surgical approach based on anatomical considerations and tumor size.
Main Methods:
- Retrospective analysis of 17 patients with TSs treated surgically between 1987 and 2008.
- Classification of tumors by size: small (<3 cm), medium (3-4 cm), large (>4 cm), and giant (>5 cm).
- Evaluation of preoperative symptoms and postoperative outcomes, including neurological function and complications.
Main Results:
- Total tumor excision achieved in 16 of 17 patients with no mortality.
- Postoperative trigeminal nerve anesthesia occurred in 7 patients; motor function preserved in 7.
- Cerebrospinal fluid leakage and facial palsy were observed in 2 patients each. One recurrence in a neurofibromatosis Type 2 patient was successfully re-operated.
Conclusions:
- Complete microsurgical removal is the optimal treatment for trigeminal schwannomas (TSs).
- Preservation of trigeminal nerve function is achievable at experienced skull base neurosurgical centers.
- Radiosurgery is suitable for residual or non-resectable tumors, not as a primary cure.