JMCR: Clinical Minute
Facial nerve schwannoma presenting as an occluding external auditory canal mass: a case report and review of the literature.
Published in Biomedical Research
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Article Highlights
- Describes a facial-nerve schwannoma presenting as an occluding external auditory-canal mass.
- Demonstrates preserved facial function despite tumor origin from the facial nerve.
- Identifies smooth posterior canal-wall erosion near the mastoid facial-nerve segment as an important CT clue.
- Shows how the lesion may mimic an aural polyp, cholesteatoma, ceruminous tumor, paraganglioma, or malignancy.
- Reinforces the risk of facial-nerve injury from an inadequately planned biopsy.
- Confirms the diagnosis histologically through Antoni A and B architecture and strong S-100 expression.
Clinical Take-Home Message
Normal facial function does not exclude a facial-nerve schwannoma.
A posterior external auditory-canal mass—particularly one accompanied by smooth canal-wall erosion—should be imaged and assessed for a possible facial-nerve origin before biopsy or excision. CT defines the bony anatomy, while MRI generally provides the best confirmation of neural origin and tumor extent.
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Life Sciences > Health Sciences > Biomedical Research
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Journal of Medical Case Reports
This journal will consider any original case report that expands the field of general medical knowledge, and original research relating to case reports.