Retrospective study of histopathological examinations performed on bitches with breast tumors at the veterinary hospital

Abstract

Neoplasia is an abnormal mass of tissue with atypical growth and without biological purpose that can reach any tissue of the animal organism. However, in dogs, breast neoplasms are more frequent, especially in bitches aged over 8 years. Therefore, it is important to know epidemiological aspects regarding this disease for the best therapeutic choice and, consequently, for the success of the treatment. Thus, the present study aimed to carry out a survey of the reports of histopathological exams performed at the Veterinary Hospital of Uberaba from January 2016 to March 2018 and to verify the most affected breeds, the tumor characteristics, such as malignancy, aspects of the neoplasm, metastatic index and recurrences, the reports of imaging exams and the most frequent hematological changes. Among the most affected animals in this period are the mixed breed dogs, Poodle, BassetHound and Labrador. Elderly animals over 8 years old had higher prevalence (84.8%) compared to adult dogs. The most important hematological changes due to the number of occurrences were thrombocytosis and normochromic normocytic anemia. Breast carcinoma and mixed mammary tumor were the most frequent 12.0 and 27.2% respectively. With this study we saw the need for a good staging of neoplasms, assisting the clinician in the therapeutic decision, improving the prognosis of cancer patients.