GROSS AND HISTOLOGICAL CHANGES WHEN DOGS ARE EXPERIENCING BREAST TUMORS

Abstract

The article explores gross and histological changes when dogs suffer from breast tumors. The author represents statistics and describes structural (gross and histological) peculiarities of dogs’ breast tumors. Breast tumor is wide-spread disease; they make 50 % of all tumors and she-dogs mostly suffer from breast tumors. The author investigates 23.8 of benign tumors and 61.1 % of malignant tumors of all breast pathological diseases. The older dogs suffer from breast tumors more whereas dog breed doesn’t affect significantly frequency of tumor suffering. The article describes gross changes when dogs are experiencing breast tumors. The author has conducted histological research of surgery, biopsy and pathological material of dogs tumors. The research resulted in discovering the following breast tumors: benign adenoma, adenocarcinoma, cancer in cuirasse and chondrosarcoma. The benign breast tumors are characterized by sufficient tumor cells growth, lack of cell atypia and infiltrative growth, connective tissue tumor and proliferation of fibrous tissue around the tumor. The malignant tumors assume high proliferation of tumor cells, polymorphism, cell atypism, infiltrative growth of the tumor, slight connective tissue stroma and lack of capsule around the tumor.