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"Lymphoma, also called lymphosarcoma or LSA, is a progressive cancer involving unregulated overgrowth of cells in organs containing lymphatic tissue, such as the bone marrow, lymph nodes, thymus, liver and/or spleen. There may be a link between canine lymphoma and exposure to environmental herbicides, household or agricultural chemicals, smoke and/or electromagnetic radiation, although the reason for such a connection is unclear. Dogs living in industrial areas where paints, solvents or chemical lawn care products are common seem to have a slightly higher incidence of lymphoma. Lymphoma typically affects aging dogs and probably has a genetic component. Affected animals show highly variable symptoms, depending on which of several types of lymphoma they have. Lymph nodes on the underside of the neck and in the groin area often are markedly enlarged but don&amp;rsquo;t appear painful. Nonspecific signs are also commonplace, including profound lethargy and depression, coughing, vomiting, diarrhea, dehydration and weight loss, among others."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.petwave.com/Dogs/Health/Canine-Malignant-Lymphoma.aspx>