Tumor venereo transmissivel (TVT) genital e cutâneo em canino: Relato de caso

Abstract

The transmissible venereal tumor (TVT), also known as transmissible venereal sarcoma or Sticker's tumor, is a round cell neoplasm that affects dogs of both sexes. It has a higher prevalence in young adults and lesions are located in the external genital mucosa. However, it can affect other organs, such as the eyeball, subcutaneous tissue, and skin. Cytology shows high cellularity where cells range from round to ovoid, round nuclei, and with numerous mitotic figures. The cytoplasm contains distinct, clear vacuoles and is surrounded by a cell membrane. Diagnosis is made through clinical findings, and its verification is through histopathological examinations through printing techniques, fine needle aspiration cytology, and incisional biopsy. The prognosis is favorable in 90% of cases, most of which occurs when the time for diagnosis and treatment are well treated. The aim of this work was to report the case of a male, mixed breed, young adult, free-living dog. He had penile sanguineous secretion, wounds in the right pelvic limb and neck region. In the cytology evaluation of the lesions, the presence of mononuclear cells with round nuclei and free nuclei compatible with that of the canine transmissible venereal tumor was found. The animal presented the genital and cutaneous form, being carried out the treatment with vincristine sulfate, totaling six complete. After treatment, total remission of penile and skin tumors is observed. This study aimed to emphasize the importance of including TVT as a differential diagnosis related to other cutaneous dermatopathies with nodular and ulcerative characteristics.