Intraparotid facial nerve schwannoma: a case report

Gibavičienė, Jolita; Čepulis, Vytautas

doi:10.6001/actamedica.v19i4.2555

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…Furthermore, immunohistochemical staining can be performed on the obtained samples to confirm the diagnosis and distinguish it from other intra-parotid tumors [ 15 ]. However, it is important to note that FNAC may not always provide a definitive diagnosis, and histopathological examination of the excised tumor is often required for confirmation [ 16 ]. In the present study, FNAC was performed and suspected a neural origin lesion like Schwannoma.…”

Section: Discussionmentioning

confidence: 99%

Sporadic neurofibroma of facial nerve presenting as parotid gland tumor: a rare case report

Hassan,

Salih,

Salih

et al. 2024

Journal of Surgical Case Reports

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Intraparotid gland neurofibroma is a rare benign tumor that arises from Schwann cells of the facial nerve within the parotid gland. This case report discusses a 41-year-old woman who experienced a painless preauricular swelling on her right side for over 5 years. Clinical examination and ultrasound revealed a well-defined mass in the parotid gland. The patient underwent total mass excision, resulting in transient facial nerve dysfunction but complete recovery. These tumors often manifest as solitary masses in the parotid region and may compress nearby structures, causing facial paralysis or numbness. Their diagnosis can be challenging due to similarities with other parotid gland tumors and possible associations with neurofibromatosis. Managing intraparotid tumors, including neurofibromas, involves a multidisciplinary approach with input from cytopathologists, radiologists, and surgeons.

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Section: Discussionmentioning

confidence: 99%

Sporadic neurofibroma of facial nerve presenting as parotid gland tumor: a rare case report

Hassan,

Salih,

Salih

et al. 2024

Journal of Surgical Case Reports

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“…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]. The MRI with gadolinium injection still the study of choice for imaging of the parotid for nerve lesions [17]. In FNS it shows a well-circumscribed mass with signal intensity isointense to muscle on T1, and hyperintense to muscle on T2 sequence [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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“…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. Thus, the nature of heterogeneity of imaging features and the resulting broad differential diagnosis make it difficult to differentiate a schwannoma from other parotid tumors by imaging studies leading to very low rates of pre-operative diagnosis.…”

Section: Discussionmentioning

confidence: 99%

“…However, there is lack of characteristic cytologic findings and exact cell type in schwannoma of parotid. 10 The definitive diagnosis of facial nerve schwannoma in parotid is made by histological examination of resected specimen or an intra-operative biopsy. 6 Intraoperatively one of the major characteristics of intra-parotid facial nerve schwannoma is the difficulty of dissection of the parotid to detect the facial nerve and its main trunk which is often dislocated by the mass.…”

Section: Discussionmentioning

confidence: 99%