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Use of Ir192 interstitial brachytherapy for an equine malignant dermal schwannoma : clinical communication

M.N. Saulez, A. Voigt, J.C.A. Steyl, E. Van Wilpe, J. Kotzen, F. Daniels
Journal of the South African Veterinary Association | Vol 80, No 4 | a225 | DOI: https://doi.org/10.4102/jsava.v80i4.225 | © 2009 M.N. Saulez, A. Voigt, J.C.A. Steyl, E. Van Wilpe, J. Kotzen, F. Daniels | This work is licensed under CC Attribution 4.0
Submitted: 28 May 2009 | Published: 28 May 2009

About the author(s)

M.N. Saulez,
A. Voigt,
J.C.A. Steyl,
E. Van Wilpe,
J. Kotzen,
F. Daniels,

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Abstract

A 10-year-old Hanoverian mare was evaluated for a right buccal swelling that recurred 3 months following surgical resection. Ultrasonographic examination showed a broadly pedunculated subcutaneous mass at the level of 106-109 and 406-409 cheek teeth associated with an erosive mucosal lesion on the inside of the cheek. Histological examination of a biopsy specimen revealed a well-demarcated, malignant, dermal schwannoma. Following subcutaneous placement of platinum coated Ir192 wires under general anaesthesia, low-dose radiation of 5 gray per day was delivered for 14 days. Short-term complications included loss of patency of the right nasolacrimal duct, erythema, dermatitis, leukotrichia and left-sided deviation of the muzzle. Ten months later, there has been no tumour recurrence. Findings suggest that the use of interstitial brachytherapy should be considered for a malignant, dermal schwannoma that has recurred or is not amenable to surgery.

Keywords

Horse; Implant; Iridium-192; Radiation Therapy

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