Lymphoma is a cancer of the lymph cells and can arise almost anywhere in the body. Although it is always frightening to learn that your pet has cancer - lymphoma is one of the most commonly treated forms of the disease. Modern treatment protocols can be highly effective in controlling lymphoma and affected dogs can have several years of normal life with appropriate treatment. In many people's mind the term 'chemotherapy' conjures up frightening images of people suffering with cancer (and the effects of treatment) - however the effects of chemotherapy in pets are usually very different.