Prevalence of affected breasts and histopathology of female dogs submitted to mastectomies in a private clinic in the city of Dourados, Mato Grosso

Abstract

The increase in the life expectancy of dogs in response to the evolution of veterinary medicine regarding the prevention and treatment of diseases is remarkable. Likewise, the rise of pathologies that affect animals of advanced age is evident, such as mammary neoplasms, which affect mainly females, elderly, unspayed or noncastrated after several estrous cycles, without racial predisposition. This research aims to collect data from the analysis of clinical data and histopathological reports of female dogs treated in Dourados, Mato Grosso (Brazil) with mammary tumors. In this survey, it was observed that of 15 female dogs with mammary neoplasia, 87% had malignant neoplasia while 13% had benign neoplasia. The caudal abdominal breasts (M4) were the most affected. Tumor sizes varied between one and five centimeters in diameter, with tumors measuring up to three centimeters being the most recurrent, and the only two benign tumors measuring 1.5 cm. Thus, it is concluded that the caudal abdominal breasts (M4) were the most affected with breast neoplasms, malignant neoformations are the most common and neoplasms with benign conformations have smaller sizes.