Aspectos clínicos e epidemiológicos do carcinoma mamário e tumor venéreo transmissível em caninos e do hemangiossarcoma em um felino.

Abstract

The objective of this thesis was to demonstrate the clinical and epidemiological aspects related to breast cancer and transmissible venereal tumor in dogs, and to report a case of otohematoma secondary to hemangiosarcoma in a cat. In the first chapter we analyzed information regarding the identification, nutritional score, epidemiology, physical examination of the breast chains and diagnosis of 80 female dogs with (n = 40) and without (n = 40) breast cancer. Prevailed those without race, elderly, with normal nutritional score, not castrated, not subjected to contraceptives, presenting irregular heat and submitted to chemical control based on pyrethroids. Female dogs with asymmetric and unevenly numbered breast chains were more frequent, and it was statistically observed that they were 11.94 times more likely to have breast cancer, concluding that amastia is an indicator factor for breast cancer in female dogs. In the second chapter, a case of otohematoma secondary to hemangiosarcoma in a cat was reported. In the dermatological evaluation, the convex face of the right auricle showed a formation compatible with otohematoma. In the cutaneous margin of the same ear, a small nodulation was seen, which on cytology revealed hemangiosarcoma. The diagnosis was suggested by cytological examination and confirmed by histopathological and immunohistochemical examination. As treatment, a wide margin conchectomy was performed. The patient was staged for three years without local recurrence or metastasis. It was concluded that hemaniosarcoma should be considered in the etiology of otohematoma of white-haired cats. In the third chapter, we evaluated the clinical and epidemiological aspects of 64 dogs with Transmissible Venereal Tumor (TVTc), correlating them to the subtypes (lymphocytoid, mixed and plasmocytoid) of this neoplasm. Prevailed dogs from the urban area, SRD, males, whole, adults, medium size, with access to the street being more sanitary compromised. In the genital region, the mixed subtype prevailed, while in the extragenital region, the lymphocytoid. Plasmacytoid was found in both regions and was generally the most prevalent for dogs in the Paraiban Semiarid. There was an important neoplastic association between the genitals and the oral and nasal cavities. There was a statistical difference between the time of evolution and volume of cTVT subtypes, and the plasmacytoid subtype was larger and resulted in more time to evolve when compared to the others. The possibility of CTV subtypes being evolutions was inferred, where the lymphoid evolves in mixed and the mixed in plasmacytoid.