Arch Craniofac Surg.  2019 Mar;20(1):71-74. 10.7181/acfs.2018.02250.

Intraparotid facial nerve schwannomas

Affiliations
  • 1Department of Plastic and Reconstructive Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea. jsn7190@hanmail.net
  • 2Department of Pathology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea.

Abstract

Schwannoma is a benign tumor rarely found in the head and neck and much less commonly found in the intraparotid facial nerve. It is a slow-growing encapsulated tumor originating from the Schwann cells or axonal nerve sheath. It can occur anywhere along the course of the facial nerve. Patients may present with symptoms of facial palsy, but the most common presenting symptom is an asymptomatic swelling. Diagnosis is usually difficult before surgical removal and histopathological examination. We report a rare case of intraparotid facial nerve schwannoma in a 57-year-old female who had sustained a mass of the right preauricular area for 3 years. She reported no pain or facial muscle weakness. Enhanced computed tomography findings revealed the impression of pleomorphic adenoma. However, intraoperative gross findings were not characteristic of pleomorphic adenoma, and a frozen biopsy was performed resulting in the impression of a nerve sheath tumor. We performed an extracapsular surgical excision without parotidectomy. Permanent histopathology and immunohistochemistry reports diagnosed the mass as schwannoma. There were no complications including facial palsy after surgery. No recurrence was found at 6 months after surgery

Keyword

Facial nerve; Neurilemmoma; Parotid gland; Schwann cell tumor

MeSH Terms

Adenoma, Pleomorphic
Axons
Biopsy
Diagnosis
Facial Muscles
Facial Nerve*
Facial Paralysis
Female
Head
Humans
Immunohistochemistry
Middle Aged
Neck
Neurilemmoma*
Parotid Gland
Recurrence
Schwann Cells
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