Section: Overview
Cancer (neoplasia) is a transformation of normal cells into abnormal malignant cells, and it can take many forms. Some involve solid masses, or tumors, while others involve the blood or bone marrow in leukemia. Cancer can develop in virtually any organ or body system. In addition, some cancers spread or metastasize to other areas of the body. They can spread to nearby tissues, or invade the blood stream or lymphatic system. Cancer commonly metastasizes to the lung. The exact symptoms, treatment and prognosis vary with the specific tumor type and situation.For more information about a specific type of cancer, click on the related articles or use the search engine.
A sarcoma is a malignant tumor composed of cells derived from connective tissue. These tumors often develop quickly and can spread (metastasize) to distant locations in the body.
Mammary gland tumors are a type of cancer that arise from breast tissue and are similar to breast cancer in women. About half of these tumors are malignant, which means they can spread, and half are benign...
Mast cell tumors, also called mastocytomas, arise most commonly in the skin and develop from a normal component of body tissues called mast cells that play a role in the process of tissue repair by releasing...
Lymphosarcoma (lymphoma) is a malignant cancer that involves the lymphoid system. In a healthy animal, the lymphoid system is an important part of the body’s immune system defense against infectious agents...
Hemangiosarcoma is a malignant cancer of the cells that form blood vessels, and when these tumors rupture, serious internal bleeding can occur. Hemangiosarcoma is considered to be a very aggressive tumor...
Hemangiosarcoma is a type of cancer that arises from blood vessels and can occur almost anywhere in the body. Usually when it occurs in bone it is due to metastasis from another site, although rarely,...
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