Clinical Retrospective Analysis of 9 Cases of Intraparotid Facial Nerve Schwannoma

Zhang, Guo Zhi; Su, Tian; Xu, Jianming; Cheng, Zhi Qiang

doi:10.1016/j.joms.2016.02.002

Cited by 10 publications

(6 citation statements)

References 46 publications

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“…In particular, intraparotid facial nerve schwannomas (IPFNS) are extremely scarce and account for approximately 14.6% of FNS [ 6 , 7 ]. Due to their extracranial course, they are often mistaken for more conventional tumors, such as pleomorphic adenomas [ 8 , 9 ]. Since there are often no clinical symptoms, like in our patients, preoperative diagnosis is complex, and there are no standard diagnostic criteria.…”

Section: Discussionmentioning

confidence: 99%

“…Due to the rare occurrence of IPFNS and clinically and radiologically uncharacteristic features, preoperative diagnosis is challenging. Marchioni et al could not identify defining radiological imaging features after reviewing 79 cases of patients with IPFNS [ 9 ]. In the association of the tumor to the fallopian canal, the diagnosis of IPFNS by MRI is more likely.…”

Section: Discussionmentioning

confidence: 99%

“…Another diagnostic method is fine needle aspiration cytology (FNAC). FNAC performed preoperatively often leads to incorrect diagnoses and inconclusive results [ 8 , 9 ]. Other studies showed that IPFNS could be detected preoperatively by FNAC in only 15 of 67 patients (22%).…”

Section: Discussionmentioning

confidence: 99%

“…A recent case report showed that in only 31.6% of cases, FNS could be detected by FNA [ 10 ]. According to many authors, there are better methods than FNAC [ 9 , 10 ]. A more reliable way to diagnose IPFNS is an intraoperative diagnosis through surgical excision and histopathologic evaluation [ 9 , 10 ].…”

Section: Discussionmentioning

confidence: 99%

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Diagnostic Challenges and Imaging Considerations for Intraparotid Facial Nerve Schwannoma: A Case Report and Literature Review

Luzha,

Kopp,

Wiesmüller

et al. 2024

Am J Case Rep

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Case series Patients: Male, 28-year-old • Female, 34-year-old Final Diagnosis: Intraparotid facial nerve schwannoma Symptoms: Asymptomatic Clinical Procedure: MRI • ultrasonography Specialty: Otolaryngology Objective: Rare disease Background: A mass in the parotid gland usually indicates parotid gland neoplasia. Warthin tumors or pleomorphic adenomas are common differential diagnoses. Less frequently, other differential diagnoses and sites of origin are considered. Schwannomas are rare, benign tumors in the head and neck region. Even more rarely, these tumors occur in the intraparotid course of the facial nerve. In the following, we report about 2 patients in whom a mass in the right parotid gland was found incidentally during magnetic resonance imaging (MRI). Case Reports: We reviewed data from the literature on intraparotid facial nerve schwannomas (IPFNS) and compared them with those from our cases. The focus was on data such as clinical history, clinical symptoms, electroneurography, and various imaging modalities, such as ultrasonography and MRI combined with diffusion-weighted imaging. Conclusions: It is challenging to distinguish facial nerve schwannomas from other neoplasms. Patient’s history, clinical symptoms, MRI examination with diffusion-weighted imaging, and high-resolution ultrasound imaging are decisive factors for diagnosis and should be performed when IPFNS is suspected. Diagnosis and therapy for IPFNS remain challenging. A wait-and-scan approach could be an option for patients with small tumors and good facial nerve function. On the other hand, patients with advanced tumors associated with limited facial nerve function can benefit from surgical approaches or stereotactic radiosurgery.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Diagnostic Challenges and Imaging Considerations for Intraparotid Facial Nerve Schwannoma: A Case Report and Literature Review

Luzha,

Kopp,

Wiesmüller

et al. 2024

Am J Case Rep

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“…Nerve injuries may occur due to several types of trauma, such as lacerations with sharp objects, gunshot wounds, crushing, fractures, tumor resections, orthognathic surgeries, and motor vehicle accidents [1][2][3][4][5]. Damage to the facial nerve (FN) can lead to functional alterations such as asymmetry and loss of facial expression, causing disorders related to self-image and recognition of the individual, as well as mental health alterations, suffering, and social isolation [4,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Stimulation of morphofunctional repair of the facial nerve with photobiomodulation, using the end-to-side technique or a new heterologous fibrin sealant

Rosso

Júnior

Buchaim

et al. 2017

Journal of Photochemistry and Photobiology B: Biology

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This research evaluated the influence of Photobiomodulation Therapy (PBMT) on lesions of the facial nerve repaired with the end-to-side technique or coaptation with a new heterologous fibrin sealant. Thirty-two Wistar rats were separated into 5 groups: Control group (CG), where the buccal branch of the facial nerve was collected; Experimental Suture Group (ESG) and Experimental Fibrin Group (EFG), in which the buccal branch was end-to-side sutured to the zygomatic branch on the right side of the face or coaptated with fibrin sealant on the left side; Experimental Suture Laser Group (ESLG) and Experimental Fibrin Laser Group (EFLG), in which the same procedures were performed as the ESG and EFG, associated with PBMT (wavelength of 830nm, energy density 6.2J/cm, power output 30mW, beam area of 0.116cm, power density 0.26W/cm, total energy per session 2.16J, cumulative dose of 34.56J). The laser was applied for 24s/site at 3 points on the skin's surface, for a total application time of 72s, performed immediately after surgery and 3 times a week for 5weeks. A statistically significant difference was observed in the fiber nerve area between the EFG and EFLG (57.49±3.13 and 62.52±3.56μm, respectively). For the area of the axon, fiber diameter, axon diameter, myelin sheath area and myelin sheath thickness no statistically significant differences were found (p<0.05). The functional recovery of whisker movement occurred faster in the ESLG and EFLG, which were associated with PBMT, with results closer to the CG. Therefore, PBMT accelerated morphological and functional nerve repair in both techniques.

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Systematic Review of Intra Parotid Facial Nerve Schwannoma and a Case Report

Singh

Kumar

Sharma

et al. 2022

Indian J Otolaryngol Head Neck Surg

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Clinical Retrospective Analysis of 9 Cases of Intraparotid Facial Nerve Schwannoma

Cited by 10 publications

References 46 publications

Diagnostic Challenges and Imaging Considerations for Intraparotid Facial Nerve Schwannoma: A Case Report and Literature Review

Diagnostic Challenges and Imaging Considerations for Intraparotid Facial Nerve Schwannoma: A Case Report and Literature Review

Stimulation of morphofunctional repair of the facial nerve with photobiomodulation, using the end-to-side technique or a new heterologous fibrin sealant

Systematic Review of Intra Parotid Facial Nerve Schwannoma and a Case Report

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