Schwannoma of the External Auditory Canal in a Filly: A Case Report

Ahmadi, Nasrollah; Oryan, Ahmad; Ghane, Mohsen; Geramizadeh, Bita

doi:10.1016/j.jevs.2013.02.007

Cited by 6 publications

(14 citation statements)

References 24 publications

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“…), extradurally in the cranium (Williamson and Farrell ), external auditory canal (Ahmadi et al . ), skin (Schöniger et al . ; Silva et al .…”

Section: Discussionmentioning

confidence: 99%

“…In a survey of equine cutaneous neoplasia, only 1.1% were schwannomas (Sch€ oniger et al 2011). The prevalence of PNST in horses appears to be very low, reportedly occurring in the small intestine (Kirchhof et al 1996), perianal region (Sturgeon et al 2008), male external genitalia (Van den Top et al 2008), extradurally in the cranium (Williamson and Farrell 1990), external auditory canal (Ahmadi et al 2013), skin (Sch€ oniger et al 2011Silva et al 2012), mediastinum (Andreasen et al 1993), cornea (Kappe et al 2009), periorbital region (Strubbe 2001), heart (Quinn et al 2005) and the epaxial musculature (Nikolaou et al 2015). Of these reports, only the last four represent cases of MPNST, showing its rare occurrence.…”

Section: Discussionmentioning

confidence: 99%

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Malignant peripheral nerve sheath tumour with metastasis and expression of endothelial differentiation factors in a horse

Bouéres

Câmara

Castro

et al. 2017

Equine Veterinary Education

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Summary Malignant peripheral nerve sheath tumour (MPNST) has not previously been well documented in veterinary literature. This article reports the case of a 12‐year‐old Mangalarga Marchador gelding presented for evaluation of a large, ulcerated and pruritic lesion in the elbow of the left forelimb. Biopsy of the mass indicated an undifferentiated sarcoma. Considering the chronicity of the condition, poor prognosis and extensive nature of the neoplasm, the horse was subjected to euthanasia. A MPNST with expression of endothelial differentiation factors was diagnosed based on gross morphology results, histological features and immunohistochemical findings.

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“…), extradurally in the cranium (Williamson and Farrell ), external auditory canal (Ahmadi et al . ), skin (Schöniger et al . ; Silva et al .…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Malignant peripheral nerve sheath tumour with metastasis and expression of endothelial differentiation factors in a horse

Bouéres

Câmara

Castro

et al. 2017

Equine Veterinary Education

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“…; Oosterlaan‐Mayer and Van der Kolk ) and a schwannoma (Ahmadi et al . ). Ceruminous adenocarcinoma is the most common malignant neoplasm in the external ear canal of dogs and cats (London et al .…”

Section: Introductionmentioning

confidence: 97%

“…Masses in the vertical ear canal of equidae have been removed previously by simple resection or traction‐avulsion in the standing (Ahmadi et al . ) or recumbent animal (Fjordbakk et al . ; Oosterlaan‐Mayer and Van der Kolk ).…”

Section: Introductionmentioning

confidence: 99%

“…To the authors' knowledge, this is the first report of a ceruminous adenocarcinoma in a horse. Masses in the equine external ear canal are rarely reported and include a squamous cell carcinoma (Stewart and Baker 1975), a sarcoid (Zwingenberger et al 2002), inflammatory polyps (Fjordbakk et al 2006;Oosterlaan-Mayer and Van der Kolk 2006) and a schwannoma (Ahmadi et al 2013). Ceruminous adenocarcinoma is the most common malignant neoplasm in the external ear canal of dogs and cats (London et al 1996;Bacon 2012).…”

Section: Introductionmentioning

confidence: 99%

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Resection of a ceruminous adenocarcinoma in a horse by a modified vertical ear canal ablation

Skärlina¹,

Tvedten²,

Roberts

et al. 2015

Equine Veterinary Education

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Summary A 13‐year‐old Swedish Warmblood mare was presented for evaluation of a mass on the medial aspect of the left vertical ear canal. The mass was initially resected using monopolar loop diathermy. Histopathological diagnosis of the excisional biopsy was a low‐grade malignant ceruminous adenocarcinoma. The clinical and histopathological features of this previously unreported neoplasm in the horse are described. A modified vertical ear canal ablation was performed in order to remove the base of the neoplasm with adequate free margins. The surgical technique is described. No recurrence was noted 2 years after surgery and the appearance and function of the pinna were retained.

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Neoplasms and other tumors

2022

Large Animal Neurology

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Schwannoma of the External Auditory Canal in a Filly: A Case Report

Cited by 6 publications

References 24 publications

Malignant peripheral nerve sheath tumour with metastasis and expression of endothelial differentiation factors in a horse

Malignant peripheral nerve sheath tumour with metastasis and expression of endothelial differentiation factors in a horse

Resection of a ceruminous adenocarcinoma in a horse by a modified vertical ear canal ablation

Neoplasms and other tumors

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