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Summary
Occult neoplasms causing gradual facial paralysis, especially when initial tests are negative, often indicate tumors in the parotid gland
Area of Science:
- Otolaryngology
- Neurosurgery
- Oncology
Background:
- Facial paralysis can be a symptom of underlying neoplasms.
- Diagnosing occult tumors associated with facial nerve dysfunction presents challenges.
Purpose of the Study:
- To identify the location and type of occult neoplasms associated with facial paralysis when initial investigations are inconclusive.
- To guide surgical investigation priorities in such cases.
Main Methods:
- Review of 14 cases of occult neoplasms presenting with facial paralysis.
- Analysis of diagnostic investigations including CT scanning, sialography, and clinical examinations.
- Correlation of negative diagnostic findings with tumor location.
Main Results:
- In cases with gradual onset and negative investigations, tumors were predominantly located in the extratemporal portion of the parotid gland's main trunk.
- 80% of these neoplasms were malignant parotid tumors; 15% were neurilemmomas of the facial nerve trunk.
Conclusions:
- Surgical investigation of the facial nerve is indicated when occult neoplasms are suspected and initial tests are negative.
- Priority should be given to the extratemporal portion of the facial nerve trunk for surgical assessment.