Tumor venéreo transmissível (TVT) extragenital em canino: Relato de caso

Abstract

The transmissible venereal tumor (TVT) is a quite recurrent round cell neoplasm in the veterinary clinical routine, mainly in tropical regions. The form of transmission is varied, but almost always involves direct contact with the lesions so that there is transplantation of cancerous cells into a healthy animal. The disease is common in Brazil, being one of the main neoplasms that affect dogs. TVT is more prevalent in stray, young and uncastrated animals, since the vast majority of cases involve direct contact with the external genitalia and social interactions, which makes urban and populated areas an important epidemiological factor. The lesions are mostly located in the external genital mucosa, but there may also be metastases to other organs, including distant sites or even extragenital lesions as the only clinical presentation, although rare. The diagnosis is obtained through cytology, histopathology and a good clinical examination. The prognosis is usually favorable, which facilitates the treatment, which is carried out through weekly applications of vincristine sulfate. The objective of this study was to report a case of extragenital TVT with primary site in the nasal cavity and metastasis in lymph nodes. The patient had submandibular swelling. TVT was diagnosed by cytology. Vincristine was used as the only treatment method, responding satisfactorily, with weekly sessions until complete remission of the tumor mass.