Pet Health Articles
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Transmissible venereal tumors (TVTs), often found in genital areas, are spread through contact with other dogs, most often sexual contact. The tumors are usually cauliflower-like in appearance. Diagnosis and treatment is discussed.
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Contenido en español actualizado.
Translated from the original English article Malignant Mammary Tumors in Dogs -
Tumors (also called cancer or neoplasms) are firm tissue growths or swellings that may occur anywhere on a bird's body, and grow out of control. Veterinary examination of any growth or lump is highly advised as tumors may grow rapidly or spread.
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Lipomas are fatty tumors that affect a variety of pet birds. These are typically benign, fatty growths found under the skin. If caught early, most lipomas respond to nutritional therapy, but they may require surgery.
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Xanthomas are discrete masses or diffuse, thickened areas of skin that are yellow-orange and dimpled in appearance. They are accumulations of fat and cholesterol and are most commonly found in cockatiels and parakeets (budgies), and especially in female birds.
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Malignant lymphoma (lymphosarcoma) and leukemia are among the most common malignancies seen in ferrets. Diagnosis may be made by fine needle aspiration or biopsy. For a dedicated owner with a compliant patient, surgery and/or treatment with chemotherapy is an option. Remission of lymphoma is possible with treatment in ferrets, but recurrence is common. Ferrets also commonly develop insulin-producing tumors of the pancreas that lower the ferret’s blood sugar and cause weakness, weight loss, lethargy, seizures, coma, and death. Insulinoma commonly spreads from the pancreas to the liver, so surgical removal of pancreatic insulinoma nodules may not be curative. Affected ferrets respond well for months to years to medical therapy with glucose-promoting drugs (prednisone) and anti-insulin drugs (diazoxide). Drugs suppress effects of the tumor but do not eliminate it; and ferrets on medical treatment must have their medications increased over time as the tumor grows.
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Tumors of the urinary tract may present anywhere from the kidneys to the tip of the urethra. Tumors of the bladder are most common in the dog whereas tumors involving the kidneys are more prevalent in cats. Unfortunately, many tumors of the urinary tract are malignant and treatment options may be limited. Surgery is possible in select cases. Medical treatment may be beneficial in cases where surgery is not possible.
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Uterine tumors are quite rare in North American pets, mainly due to routine spaying practices. Several types of tumors can arise from the tissues of the uterus. This handout discusses uterine tumors in dogs and cats. The various types of these tumors, along with the clinical signs, diagnosis, treatment, and prevention of this condition are outlined.
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Vascular tumors of the skin develop from the blood vessels of the skin. These tumors may arise anywhere on the body and appear as a firm and raised lump on or under the skin. Hemangiomas may ulcerate and bleed; hemangiosarcomas may bleed into the surrounding tissues. This type of tumor is typically diagnosed via a tissue biopsy or surgical removal of the entire tumor. Surgery is the recommended treatment for vascular tumors of the skin.
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Verdinexor (Laverdia) is a chemotherapy (anticancer) agent used to slow the growth and spread of lymphoma in dogs. It comes in tablet form. Verdinexor is considered a hazardous drug, so it is essential to avoid accidental exposure.