Epidemiology and histopathology of breast lesions in bitches and cats from Fortaleza - 2022 to 2023
Keywords:
Data survey, breast injuries, bitches, catsAbstract
Mammary neoplasms are the most common cell proliferation in female dogs, while in cats they represent the third highest occurrence in oncology clinics. From 2022 to 2023, 220 histopathological reports of mammary injuries were collected in Fortaleza, including 180 canines (179 bitches and 1 male) and 40 felines (39 females and 1 male). 238 mammary injuries were extracted from canines and 54 from felines. In canines, non-neoplastic injuries represented 2.94% of cases, 19.75% were benign neoplasms, and 77.31% were malignant neoplasms, where carcinoma in mixed tumor corresponded to 51.26% and malignant adenomyoepithelioma 11.77%. In felines, nonneoplastic injuries represented 9.26%. Benign neoplasms corresponded to 3.70%, and malignant neoplasms constituted the highest percentage with 87.04%. Among the malignant neoplasms, the most frequently seen histological type was cribriform carcinoma with 24.07%, while both malignant adenomyoepithelioma and papillary carcinoma had 16.67%. The primary tumor (T) in bitches had its highest percentage in size <3cm (T₁) with 51.68% and regional lymph nodes without metastases (N₀) represented 86.20%. In cats, tumors >3cm (T₃) were the most seen with 42.59% and the majority of regional lymph nodes showed metastases (N₁), where 55.32% were macrometastasis (>2.0mm). The results presented here are important for future studies and for a greater understanding of the biological behavior of canine and feline mammary lesions.
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