Treatment of Breast (Mammary) Cancer in Pets
Surgical removal of the tumor/s remains the cornerstone of treatment in most affected pets. For most benign mammary nodules, simple lumpectomy of these nodules is often curative. Depending on the size and number of mammary gland tumors, multiple or complete one-sided mastectomies may be needed. Adjacent lymph nodes may be aspirated to assess for cancer spread, however removal of draining lymph nodes is rarely indicated. In dogs, chemotherapy and/or radiation therapy is rarely indicated. However, in cats, chemotherapy with drugs such as Doxirubricin or Cyclophosphamide may be indicated, due to the aggressive, malignant nature of feline mammary cancer.
Prognosis for Dogs and Cats with Breast (Mammary) Cancer
Prognosis for pets with breast cancer will depend on tumor size, whether ulceration and/or spread to lymph nodes and lungs has occurred, and the histological grade of the cancer on tissue biopsy. The cell types seen on biopsy will determine long-term treatment plans and prognosis.