common among cats with FeLV infections. It affects the intestines and other lymphatic tissues (commonly the abdominal organs). Cats with these cancers may be affected by a loss of appetite, weight loss, vomiting, diarrhea, bloody stool, and constipation. Skin tumors Skin tumors are less common in cats; and although most cats are vulnerable, white cats are especially prone to this type of tumor. Skin tumors manifest as a visible lump on the skin, mostly affecting vision, smell, or eating. Benign tumors take several years to develop and are more difficult to detect due to their freely movable nature. The only indicator of benign tumors is self-trauma of a form called lick granuloma or "boredom sores", which can be caused by excessive licking by the cat. This is a sign that the cat is suffering from anxiety. Mammary gland tumors Mammary gland tumors are the third common type of cancer in older female cats, with the most common symptom manifesting as a lump in the breast tissue. Domestic short-haired cats and Siamese appear to have a higher incident rates. The tumor is typically firm and nodular, and adheres to the overlying skin. Nipples may also appear to be red and swollen, oozing yellowish fluid. Despite the overall poor prognosis of feline mammary carcinomas, in one study some cats survived >6 months, indicating that adjuvant treatment may be an option to consider in metastatic disease. Abdominal tumor Abdominal tumor is among the rarest forms of cancer in cats, and most difficult to treat successfully before progressing to an advanced stage. The main symptoms include abdominal enlargement, vomiting (often with blood), weight loss due to poor digestion, and weakness. Types of tumor Adenomas affect sebaceous glands predominantly in the limbs, the eyelids and the head. They are also commonly-found in the ears (and ear canals) of cats and may lead to the development of hyperthyroidism. These adenomas typically appear as cauliflower, wart-like growths with a pink-orange tinge. They can be diagnosed either through their physical appearance or a biopsy testing. Fibrosarcomas arise from the fibrous tissues just beneath the skin. They may be present as solitary, irregular masses on the skin. Diagnosis is made through biopsy evaluation which is followed by treatment with surgery, radiation, and chemotherapy. Lipomas occur within the fatty tissues and reside as soft, fluctant round masses that adhere tightly to surrounding tissue (typically to organs and the membrane linings