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Published on: March 1, 2015
[Infected epidermoid cyst as cause of peripheral facial palsy. A case report]
M Streppel1, J P Thomas, E Stennert
1Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie der Universität zu Köln.
Background:
Extratemporal processes are rare causes of peripheral facial palsy. Only 17 cases of facial palsy in association with a suppurative or necrotic parotitis are reported in the literature.
Patient And Results:
We present a case of a peripheral facial palsy initiated by an infection of a epidermoid cyst, which consecutively involved the whole parotid gland. After abscess drainage and antibiotic therapy the inflammation process receded. The palsy persisted over a period of 4 weeks but improved completely.
Conclusions:
As the facial nerve was not enclosed by the abscess formation the palsy must have been caused indirectly. It may be assumed the inflammation spread into the Fallopian canal through the stylomastoid foramen and caused a metabolic imbalance similar to the supposed vicious circle for Bell's palsy. Due to the relapse tendency of inflammations of epidermoid cysts it is recommended to remove the entire cyst.
Insights
Peripheral facial palsy can rarely be caused by extratemporal processes like infected epidermoid cysts. Prompt treatment of parotid gland abscesses led to complete recovery of facial nerve function.
Area of Science:
- Otolaryngology
- Neurology
- Pathology
Background:
- Peripheral facial palsy is infrequently linked to extratemporal conditions.
- Suppurative or necrotic parotitis associated with facial palsy is exceptionally rare, with only 17 reported cases.
Observation:
- A case of peripheral facial palsy originating from an infected epidermoid cyst involving the entire parotid gland is presented.
- The patient underwent abscess drainage and antibiotic treatment, leading to resolution of the inflammation.
Findings:
- Facial palsy persisted for 4 weeks but ultimately resolved completely.
- The facial nerve was not directly encased by the abscess, suggesting indirect causation of the palsy.
Implications:
- Inflammation likely spread to the Fallopian canal, potentially causing a metabolic imbalance similar to Bell's palsy.
- Complete cyst excision is recommended due to the high recurrence rate of epidermoid cyst infections.
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