ESTUDO DAS NEOPLASIAS MAMÁRIAS DIAGNOSTICADAS EM CADELAS NO LABOTÓRIO DE PATOLOGIA VETERINÁRIA DA UNIVERSIDADE FEDERAL DA PARAÍBA (2013 a 2017)

Abstract

Mammary neoplasms represent one of the most common conditions in bitches, however there is a lack of consistent data on epidemiological and clinicopathological aspects in Paraíba’s Brejo. In this context, the objective of this study was to determine the prevalence of mammary tumors and their different histological types in bitches in the Laboratory of Veterinary Pathology of the Federal University of Paraíba (LPV-UFPB). For this purpose, the LPV-UFPB registration books dated from 2013 to 2017 were consulted. The histological types diagnosed, the races and age affected, the morphological aspects of the neoplasia as well as their location were verified. When necessary, histological slides were reassessed to confirm the diagnosis. The data were tabulated with the Microsoft Office Excel 2016 program to calculate the prevalence of neoplasms, mean age of affected dogs and prevalent racial pattern. In the last four years 96 cases of breast tumors and 113 histopathological patterns were evaluated. Of these, 20.8% were benign tumors and 79.2% were malignant tumors, the mean age of the female dogs was 9.7 years and the racial pattern most affected was the SRD followed by the Poodle breed. Among malignant neoplasms, the most frequent were simple carcinoma, followed by mammary carcinoma in a mixed tumor; among the benign, the most frequent was the breast adenoma. Regarding morphology, it was observed that most of these neoplasms had firm consistency, lobular shape and granular surface that occasionally exhibited ulceration and were mostly concentrated in the last three pairs of mammary glands. From a clinical point of view, breast neoplasms are easily diagnosed because of their morphological characteristics and location, which, according to this study, was similar to that described in the literature. A breast tumor may exhibit more than one histopathological classification, most likely due to the change ability of the breast tissue in response to hormonal factors. The determination of this profile is important to define clinical therapeutics and prognosis. The age observed reflects a typical condition of adult female dogs to the elderly and, with respect to the racial pattern, the incidence of the SRD pattern suggests the regional profile where such a canine population is the most reported. In this study, the prevalence of simple carcinoma, mixed tumor carcinoma, and adenomas were verified in SRD and Poodles dogs of, on average, 9.7 years in the Brejo of Paraíba.