Schwannoma of the external auditory canal: An exceptional site

Sbai, Achraf Amine; Lachkar, Azeddine; Elayoubi, Fahd; Ghailan, R.

doi:10.1016/j.anorl.2019.02.014

Cited by 7 publications

(14 citation statements)

References 6 publications

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“…3,6 The most common symptom is a slow-growing mass without pain. 1,4,6 The symptoms of EAC schwannomas reflect tumor size and location. 3 As the mass grows, recurrent otitis externa and conductive hearing loss caused by EAC occlusion may develop.…”

Section: Discussionmentioning

confidence: 99%

“…1,4,6 Neurogenic symptoms (pain or paresthesia) are rare. [1][2][3][4]6 The treatment of choice is surgical excision. [1][2][3][4]6 The tumor can be removed using a transcanal or transmastoid approach depending on its size, location, and relationships with surrounding structures.…”

Section: Discussionmentioning

confidence: 99%

“…1,4 Schwannoma in the EAC should be differentiated from osteoma, myxoma, fibroma, lipoma, hemangioma, chondroma, leiomyoma, neurofibroma, desmoplastic melanoma, granuloma, and sebaceous adenoma. [1][2][3][4]6 The definitive diagnosis is based on histopathological and immunohistochemical findings; [2][3][4]6 histopathology is mandatory after excision.…”

Section: Discussionmentioning

confidence: 99%

“…S chwannoma is a slow-growing, benign tumor originating from the Schwann cells of peripheral nerve sheaths. [1][2][3][4][5][6] Schwannomas are most common in the vestibulocochlear nerve within the cranial vault; 25% to 45% of extracranial schwannomas occur in the head and neck region. 1,4 Schwannoma in the external auditory canal (EAC) is rare; few cases have been reported.…”

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confidence: 99%

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Schwannoma in the External Auditory Canal

Jeong

Choi

2021

Journal of Craniofacial Surgery

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Schwannoma is a slow-growing, benign tumor originating from the Schwann cells of peripheral nerve sheaths. Schwannoma in the external auditory canal is rare but should be included in the possible diagnosis of a cystic mass. If schwannoma is suspected, computed tomography or magnetic resonance imaging should be performed to explore tumor size, location, possible extension, and origin before excision. The authors here present a large schwannoma that almost completely occluded the external auditory canal and was completely excised using a transcanal approach.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Schwannoma in the External Auditory Canal

Jeong

Choi

2021

Journal of Craniofacial Surgery

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“…26 In the case of schwannoma of the external auditory canal presents with hearing impairment, tinnitus, vertigo, aural fullness, recurrent otitis externa, and autophony. 27 The preoperative diagnosis is often difficult as most schwannomas do not show neurological-related symptoms. 28 Schwannoma may mimic certain diseases such as tumor metastasis or infection.…”

Section: Clinical Presentationsmentioning

confidence: 99%

Schwannoma of the pinna: a narrative review

Swain

2022

Int J Res Med Sci

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Schwannomas are uncommon and benign neurogenic tumors that originate from the nerve sheath of the myelinated nerves. It can be found in any peripheral, cranial or autonomic nerves which contain Schwann cells. It is also called neuroma, nerve sheath tumor and neurilemmoma. Schwannomas in the head and neck region often present as painless swelling. The growth of schwannoma of the pinna causes an aesthetic alteration of the pinna. Schwannoma is a rare tumor of the pinna. The diagnosis of schwannoma is confirmed by histopathological study and immunohistochemistry. Histopathologically, it shows encapsulated, well-circumscribed lesions composed of different cellular patterns and arrangements. Histologically, the hallmark of schwannomas is the pattern of alternating Antoni A and Antoni B areas. The treatment of choice for schwannoma of the pinna is complete surgical excision. Recurrence following complete excision of the schwannoma is rare. Because of their rarity, these tumors are often not included in the differential diagnosis of the mass on the pinna. Preoperative suspicion and awareness are very important for schwannoma of the pinna to avoid delayed diagnosis and treatment. There is not much literature on the schwannoma of the pinna, indicating that this clinical entity is neglected. The objective of this article was to provide a comprehensive review of the schwannoma of the pinna including its epidemiology, etiopathology, clinical presentations, diagnosis and treatment.

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