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Cats + Tumors + English

  • Fibrosarcoma is a tumor originating from the fibroblasts of the skin and subcutaneous connective tissue. The tumors vary in growth rate.

  • Fibrous tissue consists of long fibers of the collagen protein. These fibers form a structural part of specialized tissues such as bone and cartilage.

  • It is important to recognize that multiple tumors in the liver are not always cancers. The livers of older dogs may become nodular without causing any clinical effects.

  • The liver has a massive blood supply so many cancer cells from elsewhere arrive within it and start to grow. In dogs, metastatic tumors are three times as common as primary tumors and over 30% of malignant cancer may metastasize to the liver.

  • Most primary lung cancers originate from the epithelium lining the airways. In dogs, most develop in the alveoli where oxygen is taken up into the body, but in people and in cats most originate in the main airways (bronchi).

  • Lymph is a fluid that circulates in the body, transporting cells of the immune system (macrophages and lymphocytes) to sites where they are needed and draining areas where excess fluid or debris has accumulated, such as occurs with inflammation.

  • Lymphocytes are specialized cells that function as part of the body's immune system, and are key cells in the body's ability to fight and prevent infection. Lymphocytes are found in the blood and tissues throughout the body, and are in particular concentration in lymph nodes and other 'lymphoid tissue'.

  • Lymphoma is a cancer of the lymphocytes. Lymphocytes are cells that are involved in the immune system. Lymphoma is connected with feline leukemia, a viral infection. Feline lymphoma most commonly affects the intestines. Therefore, clinical signs of lymphoma are often similar to other intestinal diseases. Diagnosing lymphoma requires finding cancerous cells on microscopic examination. Lymphoma cannot be prevented, but the likelihood of a cat developing lymphoma can be decreased by preventing feline leukemia virus infection.

  • The most common forms of cutaneous lymphoma are epitheliotropic lymphoma and dermal lymphoma. No specific risk factors or causes have been identified in the development of cutaneous lymphoma. Generally, cutaneous lymphoma can appear as various-sized irritated, ulcerated, or infected patches anywhere on the skin, including the gums, nose, or lip margins. These areas may become ulcerated and bleed, or become crusted. Secondary infections are possible. By far, the most common treatment for cutaneous lymphoma is chemotherapy. Unfortunately, the response to treatment, although initially encouraging, is typically short-lived, with gradual return of the tumors.

  • This is a tumor originating from cells of the mammary glands. In the cat, most mammary tumors are potentially or already malignant, so early surgical removal is important in preventing spread to other parts of the body (metastasis).

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