Características anatomopatológicas de neoplasias mamárias ... - Uece

ABSTRACT
In despite of the high frequency of mammary neoplasms in bitches and their similarities with
mammary tumors in women, it is necessary to investigate the pathologic aspects of these
neoplasms. The aim of this study was to describe the pathologic characteristics of mammary
neoplasms in bitches raised on city of Fortaleza - Ceara. The samples were collected in
veterinary clinics. After fixation, the material was evaluated macroscopic and submitted to
histology classic process. The slides microscopic were estimated under optical microscopic.
The results were organized in descriptive statistics and submitted to the Mann-Whitney test (p<
0.05). The medians of macroscopic of the malignant neoplasms showed superiority for values
of the breadth and density. In microscopy, it was found 77.14% of malignant neoplasms;
14.29% for benign tumors and 8.57% for atypical hyperplasia. The benign hystological types
with high frequency were the intraductal papilloma (40%) and filoides cystadenoma (40%). In
malignant neoplasms, the high occurrence was the adenocarcinoma (70.37%). The malignant
tumors showed diversity of stroma components when comparable with benign neoplasms.
These components were the tissue cartilaginous (44.44%), tissue bone (40.70%), areas of
necrosis (59.20%), infiltrate of inflammatory cells (48.10%), desmoplasia (40.70%), vascular
invasion (29.70%) and angiogenesis (22.22%). Thus, there was superiority of biometrics values
of the malignant neoplasms when comparable with benign tumors. In term of biological
behavior, the malignant neoplasms were of high frequency. The tumors of source epithelial
were predominance. The areas of necrosis was the stroma characteristic more occurrence
malignant neoplasms of the mammary gland in bitches.