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Clinical manifestations of facial nerve schwannoma in Korea
J Korean Skull Base Soc 2024;19(1):1-10
Published online May 30, 2024
© 2024 Korean Skull Base Society.

Yong Jun Kim1,*, Hye Sook Choi2,*, Sung Soo Kim3, Jae Min Lee4, Seung Geun Yeo4

1Department of Pathology, College of Medicine, Kyung Hee University, Seoul, Korea
2Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul, Korea
3Department of Biochemistry and Molecular Biology, College of Medicine, Kyung Hee University, Seoul, Korea
4Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
Correspondence to: Seung Geun Yeo

*These authors contributed equally to this work as first authors.
Received April 5, 2024; Revised April 21, 2024; Accepted April 22, 2024.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study aimed to conduct a systematic review of facial nerve schwannoma cases in Korea, spanning from 1996 to 2023. A systematic literature search identified 22 relevant articles covering 73 facial nerve schwannoma patients. Postoperative evaluations assessed improvements, stability, or worsening of facial paralysis symptoms, with the follow-up period ranging from 3 days to 73 months. The most common symptoms were facial palsy, affecting 50.7% of patients, followed by hearing loss and parotid mass. Site distribution indicated the mastoid segment as the most common, followed by the tympanic segment, the parotid segment, the geniculate ganglion, the internal auditory canal, the labyrinthine segment, the greater superficial petrosal nerve, the canalicular segment, the chorda tympani nerve, the cerebellopontine angle, the cisternal segment, and the middle cranial fossa. Postoperative evaluation demonstrated improvement in 24%, no change in 47%, and worsening in 29% of cases. While surgical removal remains essential for complete recovery, our findings suggest a need for careful consideration, as only a minority of patients benefited from the procedure. This study provides a comprehensive overview of facial nerve schwannoma in the Korean population, contributing valuable insights for clinical practice.
Keywords : Facial nerve, Neurilemmoma, Schwannoma, Facial palsy

May 2024, 19 (1)
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