Manifestation of Tumours in Domestic Animals in Warmia and Mazury (Poland) Between 2003 and 2011

Samples of tumours collected during necropsies or received from veterinary clinics, as well as biopsies were analysed. The analysis revealed 2259 tumours, including 1814 (80.30%) cases from dogs, followed by 295 (13.06%) cases from cats, 79 (3.50%) cases from horses, and 71 (3.14%) cases from exotic animals. Skin and subcutaneous tissue (45% of dogs and 48% of cats), and mammary gland (23% of dogs and 29% of cats) were the most common location of tumours. Malignant forms prevailed in dogs (59%), cats (66%), and horses (89%). The analysis revealed interesting facts concerning the middle age of dogs and cats with tumours present with a peak in nine-year-old dogs and 10-12-year-old cats.