Trabalho de Conclusão de Curso e Relatório de Estágio Obrigatório

Abstract

Mammary neoplasms in felines have become a prominent area in veterinary medicine, especially in veterinary oncology and feline medicine, since 80% of neoplasms are malignant. Comparatively, female dogs have a higher incidence of mammary tumors, although their malignancy rate is lower than that of felines, as well as presenting a greater variety of benign and malignant histological types and responding to early spaying with a significant reduction in the risk of developing mammary tumors. Human and veterinary studies reveal similarities in prognostic markers with tumor biology, for example gene expression, hormone receptors, in addition to the correlation between histological grade, mitotic count and survival. This work aims to describe a case of a 9-year-old spayed female cat, diagnosed by histopathological and immunohistochemical examination with malignant adenomyoepithelioma in the right M1, presenting a nodule with a diameter of 0.5 cm, of firm consistency and regular surface. A preventive bilateral mastectomy was performed along with chemotherapy treatment with carboplatin. Four months after the end of treatment, the animal was doing well and without recurrence of other neoplasms.