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Primary neoplasms of the facial nerve
Abstract:
A series of 30 primary facial nerve tumors is reviewed. Most of them were benign (n = 26); there were four malignant tumors. Neoplasms originating within the temporal bone were found to have preoperative facial paralysis in 84 percent of cases; the extracranial tumors had a 35 percent incidence of preoperative facial paralysis. All tumors in this series were treated surgically--by means of a middle fossa or transmastoid approach for the intratemporal group of tumors; the extracranial tumors were removed by the technique of parotid tumor surgery with complete facial nerve dissection. All the patients with preoperative facial weakness required facial nerve transection. Facial paralysis was rehabilitated with nerve grafts, hypoglossal crossover, or muscle transfers. Because "normal" facial expression is still not attainable following repair of complete facial nerve transection, an early diagnosis, hopefully prior to total neurotmesis, is essential. All patients with unexplained facial weakness, especially that which is progressive and persistent, should have the entire course of the facial nerve investigated for the possibility of treatable etiology.
Insights
Facial nerve tumors, mostly benign, often cause facial paralysis. Early diagnosis and surgical intervention are crucial for managing these neoplasms and improving outcomes, though complete recovery of facial expression remains challenging.
Area of Science:
- Neurosurgery
- Otolaryngology
- Oncology
Background:
- Facial nerve tumors are rare and can lead to significant morbidity, primarily facial paralysis.
- Understanding the characteristics and treatment outcomes of these tumors is essential for effective patient management.
Purpose of the Study:
- To review a series of primary facial nerve tumors.
- To analyze the relationship between tumor location and preoperative facial paralysis.
- To evaluate surgical management and reconstructive techniques for facial nerve tumors.
Main Methods:
- Retrospective review of 30 primary facial nerve tumors.
- Surgical treatment via middle fossa, transmastoid, or parotid tumor surgery approaches.
- Rehabilitation of facial paralysis using nerve grafts, hypoglossal crossover, or muscle transfers.
Main Results:
- 26 benign and 4 malignant facial nerve tumors were identified.
- Intratemporal tumors had an 84% incidence of preoperative facial paralysis, versus 35% for extracranial tumors.
- All patients with preoperative weakness required facial nerve transection and subsequent reconstruction.
Conclusions:
- Early diagnosis of facial nerve tumors is critical to prevent irreversible nerve damage and optimize functional recovery.
- While surgical intervention can address the tumor, achieving normal facial expression after complete nerve transection remains a significant challenge.
- Investigating unexplained, progressive facial weakness is vital to rule out treatable facial nerve tumors.