Canine Cancer - Lymphoma
(Continued article ... page 3 of 8)
| Characteristics / Terms | Hemangiosarcoma | Lymphoma |
| Histiocytomas | Mammary Tumors | Testicular Tumors |
| Mast Cell Tumors | Bone Cancer |
Lymphoma in Dogs
Lymphoma, otherwise known as Lymphosarcoma, is a common cancer and can occur in the lymph nodes, spleen, liver, and other organs. The cancer can be aggressive and if left untreated can be fatal.
Dogs at Risk of Lymphoma
Lymphomas primarily affect middle-aged to older dogs. There does not appear to be a differentiation as to breed or sex. Only a small portion of dogs are clinically ill at presentation; the majority are brought in because of recently identified swellings or lumps.
Causes of Lymphoma
While we understand how lymphomas form, we still do not understand why. In cats, there appears to be a strong link between some forms of lymphoma and infection with feline leukemia virus, but in dogs such a link is not apparent. Some authors have speculated that environmental factors (exposure to pesticides or strong magnetic fields) might play a factor, but there is currently no strong proof of this. At the same time, some studies have also hinted at a possible genetic correlation.
Symptoms of Canine Lymphoma
The symptoms of lymphoma are related to the location of the tumor(s). Tumors that develop in the lymph nodes often present as swellings with no other symptoms. The gastrointestinal form often is accompanied by vomiting, diarrhea, weight loss, and lack of appetite. The chest form often presents with shortness of breath and muffled heart sounds. The cutaneous (skin) form can present in several different ways, including single or multiple lumps in the skin or mouth. These bumps can itch or be red and ulcerated.
Diagnosis
Lymphoma is diagnosed with a combination of tests, including blood tests, fine needle of the tumor, biopsies, X-rays, and ultrasound. The exact tests performed depend on the location of the tumor.
continued »»
