Tumor venéreo transmissível em sistema respiratório superior de canino

Abstract

Transmissible Venereal Tumor (TVT) is one of the most common neoplasms that affect dogs, it has no predilection for sex or breed, but it has a higher incidence in free-ranging dogs that have access to the street. Transmission occurs through the implantation of tumor cells, from one animal carrying the disease, to another, during intercourse or through contact between mucous membranes during the habit of licking the genitalia affected by the tumor. They generally present on the genitalia, and can also occur in extragenital regions, such as the snout, eye, mouth and subcutaneous tissue. The tumor has a multilobulated appearance, resembling a cauliflower, is friable, hemorrhagic and grows irregularly. The diagnosis is made through anamnesis, physical examination, tumor cytology and histopathology for the definitive diagnosis. The treatment of choice is chemotherapy with anvicristine sulfate, applied intravenously, weekly, always preceding a blood count to analyze the patient's general health status. Considering that TVT is not commonly described in the nasopharyngeal region of dogs, this work aims to report the case of a four-year-old Shitzu dog, which presented the tumor, with conformations not characteristic of a TVT in the nasopharyngeal region, diagnosed through tomography and histopathology of the tumor, removed after surgical incision.