TUMOR VENÉREO TRANSMISSÍVEL PLASMOCITÓIDE CUTÂNEO EM CÃO: RELATO DE CASO

Abstract

The Canine Transmissible Venereal Tumor (CTVT) is a round cell neoplasia that affects, in most cases, the external genital mucosa of dogs. CTVT is a contagious disease that affects dogs with a higher incidence of non-domiciled and undefined dogs. The transmission occurs through implantation of tumor cells during sexual contact or mucosa between carrier dogs and susceptible dogs. A rare variation of CTVT is the Transmissible Cutaneous Venereal Tumor, a form of neoplasia that has the same tumor cells present in the genital form of the disease and differs from CTVT as it may be present with a firm, nodular, papillary or multilobular consistency. The neoplasia can invade other tissues through venereal tumor cell transplantation, licking and/or biting, affecting the cutaneous and subcutaneous tissue, anus, snout, eyeball or others tissues. Another body dissemination form of the disease is extra-genital metastases, which is rare, but can be seen in regional lymph nodes, scrotum, perineal area, spleen and liver. The diagnosis is made mainly by clinical, cytological and/or histopathological examination. The objective of this study is to report a case of a Cutaneous Transmissible Venereal Tumor in an 8-year-old domiciled dog, with an increase in the penile region and skin and nodular ulceration areas, attended at the Veterinary Hospital of the Federal University of Paraíba. In the histopathological examination, it was diagnosed the presence of round to ovals neoplastic cells, similar to the Canine Transmissible Venereal Tumor. The importance of a fast diagnosis is emphasized, including CTVT as a differential diagnosis for cutaneous neoplasia.