Mammary neoplasia is very common in dogs and cats. The diagnosis is confirmed by histopathology and is important for determining treatment and prognosis. In this session we will look at how to approach diagnosing mammary masses using cytology and histology and what to expect from your pathology report. We will speak about classification and the use of grading for mammary tumours in dogs and cats, as well as discussing some of the more recent helpful prognostic indicators. We will also touch upon mammary tumours in small mammals. The session is aimed at veterinary practitioners, nurses, new graduates and clinical stage veterinary students.