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MALIGNANT PERIPHERAL NERVE SHEATH TUMOUR IN A SOW
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Universidade Federal de Minas Gerais. Veterinary School. Department of Veterinary Clinic and Surgery. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Veterinary School. Department of Veterinary Clinic and Surgery. Belo Horizonte, MG, Brazil
Laboratório de Microbiologia Veterinária, Microvet. Viçosa, MG, Brasil
Praça Coronel Amantino. Piranga, MG, Brasil
Laboratório de Microbiologia Veterinária, Microvet. Viçosa, MG, Brasil
Universidade Federal de Minas Gerais. Institute of Biological Sciences. Department of General Pathology. Belo Horizonte, MG Brazil
Universidade Federal de Minas Gerais. Institute of Biological Sciences. Department of General Pathology. Belo Horizonte, MG Brazil
Universidade Federal de Minas Gerais. Veterinary School. Department of Veterinary Clinic and Surgery. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Veterinary School. Department of Veterinary Clinic and Surgery. Belo Horizonte, MG, Brazil
Laboratório de Microbiologia Veterinária, Microvet. Viçosa, MG, Brasil
Praça Coronel Amantino. Piranga, MG, Brasil
Laboratório de Microbiologia Veterinária, Microvet. Viçosa, MG, Brasil
Universidade Federal de Minas Gerais. Institute of Biological Sciences. Department of General Pathology. Belo Horizonte, MG Brazil
Universidade Federal de Minas Gerais. Institute of Biological Sciences. Department of General Pathology. Belo Horizonte, MG Brazil
Universidade Federal de Minas Gerais. Veterinary School. Department of Veterinary Clinic and Surgery. Belo Horizonte, MG, Brazil
Resumen en ingles
Nodular lung lesions in swine are frequently due to abscesses or granulomatous pneumonia. Although tumours are rarely reported in modern pig farming, they should be considered as a differential diagnosis when nodular lung lesions are found. A first-parity sow exhibiting respiratory signs was euthanized. Several whitish firm nodules, not encapsulated, ranging in diameter from 0.5 to 5 cm were present in all lung lobes. Microscopically, the nodules were composed of dense neoplastic cells, mainly in Antoni types A and B patterns, infiltrative and with development of emboli. All neoplastic cells stained positively by immunohistochemistry for vimentin and S-100 protein, with variable immunostaining for glial fibrillary acidic protein and stained negative for cytokeratin. Based on the gross, histological and immunohistochemical features, the tumor was diagnosed as malignant peripheral nerve sheath tumour.
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