Intraparotid facial nerve schwannoma: A case report

Jaiswal, Abhishek; Mridha, Asit Ranjan; Nath, Devajit; Bhalla, Ashu Seith; Thakkar, Alok

doi:10.12998/wjcc.v3.i3.322

Cited by 17 publications

(13 citation statements)

References 13 publications

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“…2,7 USG findings in our case were also similar. CT scan is not diagnostic as mentioned by various authors.…”

Section: Discussionsupporting

confidence: 84%

“…However, our CT scan findings of a well-defined heterogenous enhancing lesion with multiple cystic areas and mild increased vascularity were also reported by M. Irfan et al and Schwan T Joseph et al 8,9 Authors have suggested a target sign for neurogenic neoplasm. 7,8 MRI with gadolinium is the study of choice for imaging the parotid for suspected nerve lesions. 10 A multitude of parotid tumor will display identical features on imaging including parotid duct cysts, Warthin's tumor and cystadenoma.…”

Section: Discussionmentioning

confidence: 99%

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Intra-parotid facial nerve schwannoma: case report of a rare entity

2016

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“…2,7 USG findings in our case were also similar. CT scan is not diagnostic as mentioned by various authors.…”

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Intra-parotid facial nerve schwannoma: case report of a rare entity

2016

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“…4 Intratemporal facial nerve schwannoma presents as a nerve dysfunction in the form of facial paresis while extratemporal nerve involvement presents as a parotid mass without nerve dysfunction. 5 There are no definite radiological findings of intraparotid schwannoma.6 MRI is the radiological test of choice for detecting facial nerve schwannoma. The most common signs are a mass with signal intensity isointense to muscle on T1 and hyperintense to muscle on T2 sequence, respectively.…”

Section: Discussionmentioning

confidence: 99%

Intraparotid Facial Nerve Schwannoma in a 40-Year-Old Male with Hearing Loss – A Case Report

Nabi

Ishaq

Tahir

et al. 2020

J Islamabad Med Dental Coll

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Schwannoma is a benign tumor of axonal nerve sheath. Head and neck area, particularly parotid gland is an uncommon site for Schwannoma, however it can rarely arise from the intraparotid part of facial nerve and present as either a symptomless mass or facial paresis. Its diagnosis before surgical intervention is important for the conservation of parotid gland and facial nerve. On clinical examination and imaging studies, it can be misdiagnosed easily. FNAC is a helpful tool for its diagnosis. This entity should not be ignored while dealing with parotid masses. We present a case of a patient who came with the complaint of a parotid mass. Magnetic imaging resonance (MRI) scan suggested a parotid tumor which proved to be a spindle cell neoplasm on Fine Needle Aspiration Cytology (FNAC). A definite diagnosis of schwannoma of intraparotid facial nerve was made on histopathological examination of the excision sample.

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“…Preoperatively it is difficult to diagnosis and differentiates the intraparotid FNS from other parotid tumors, because its low prevalence and very few typical clinical and radiological signs associated with it. On Ultrasonography, schwannoma appear as a cystic mass with internal septations [14,15]. On computed tomography scan, the appearance of schwannoma in the parotid, is a smooth and well circumscribed lesion; and it may revealed the osseous changes [16].…”

Section: Discussionmentioning

confidence: 99%

Facial Paralysis Caused By an Unusual Parotid Tumor: Facial Nerve Schwannoma A Case Report

Lassikri¹,

Bencheikh²,

Lina³

et al. 2019

SJMPS

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Facial nerve schwannoma is an uncommon benign tumor, which is rarely encountered in the parotid gland, and mimicking the tumors of this gland. It's a neurogenic lesion that arises from Schwann cells of peripheral nerve sheath. Most of cases, it is localized in the intratemporal segment of the facial nerve, only 9% that occur in the extratemporal segment. Intraparotid facial nerve schwannoma was firstly described by Ibarz in 1927. Even if the tumor arises from the nerve itself, the function of the facial nerve is generally unaffected. If there is facial paralysis, it is interfered with malignant parotid tumors. Because of the heterogeneity of imaging features, it is difficult to diagnosis and differentiate preoperatively the intraparotid facial nerve schwannoma from other parotid tumors, so the definitive diagnosis is made by histological examination of resected tumor. The management of intraparotid facial nerve schwannoma is a very contested issue within the literature. Because the benignity and low evolutionary potential of the tumor, some authors advocating a conservative attitude with clinical surveillance for patients without facial nerve dysfunction or for tumor localized in the parotid gland. However, if a severe or a sudden facial nerve dysfunction, or extension into the mastoid was founded, the surgical resection of the tumor is indicated without delay. We report a case of a 24-year-old young female, complaining of a slow-growing and painless mass in the left parotid area, associated with grade V facial paralysis on left side since 10 years. No lymphadenopathy was founded in the neck. The computed tomography scan was revealed a heterogeneous tumor, involving in superficial and deep lobes of the left parotid gland, and extending into the parapharyngeal space. On surgical exploration, the dissection of facial nerve and isolation of the mass was impossible. Because the patient had a facial paralysis preoperatively, we had to sacrifice the facial nerve to remove the tumor by total parotidectomy for definitive diagnosis and treatment. The tumor was histopathologically confirmed to be schwannoma of facial nerve in the left parotid gland. The purpose of this study is to highlight the rarity of intra-parotid facial nerve schwannoma occurrence, its clinical features, and the difficulties of diagnosis and management, with review of the literature.

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Intraparotid facial nerve schwannoma: A case report

Cited by 17 publications

References 13 publications

Intra-parotid facial nerve schwannoma: case report of a rare entity

Intra-parotid facial nerve schwannoma: case report of a rare entity

Intraparotid Facial Nerve Schwannoma in a 40-Year-Old Male with Hearing Loss – A Case Report

Facial Paralysis Caused By an Unusual Parotid Tumor: Facial Nerve Schwannoma A Case Report

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