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Dogs + Tumors + English

  • A tumor is a lump. Not all are cancerous. Panniculitis is usually visible as a lump but it is an inflammation of the subcutaneous fatty tissue and is not cancerous.

  • Papillomas are benign, sometimes multiple, tumors caused by viruses. They are commonly known as warts. The tumors often disappear spontaneously because the animal slowly develops immunity to them.

  • The four parathyroid glands (two on each side) are closely associated with the thyroid gland, located just below the larynx or voice box in the neck.

  • The pituitary gland is an endocrine gland located at the base of the brain. Endocrine glands produce specialized chemicals called hormones, which regulate and integrate many activities to maintain internal stability of the body.

  • Plasma cell tumors develop as a result of dysregulated production of plasma cells and are relatively uncommon in dogs and cats. Some plasma cell tumors are benign and are typically confined to the skin or oral cavity, and most are very treatable. Surgical excision is the treatment of choice for removal of benign plasma cell tumors, with little to no recurrence if completely excised. Conversely, multiple myeloma is an aggressive cancer that is usually treated with chemotherapy.

  • The definition of a pneumothorax is an accumulation of air outside the lungs, but inside the chest wall. The air outside the lung prevents the lungs from inflating normally, and can lead to lung collapse. There are several variations of pneumothorax.

  • Tumors of the prostate are relatively uncommon in dogs and extremely rare in cats. The most common tumor is prostatic adenocarcinoma. Clinical signs include blood in the urine, changes in urination habits, or straining to urinate or defecate. Metastasis to the pelvic bone and/or lumbar spine is likely. FNA of the prostate aids in the diagnosis, though surgical biopsy may need to be considered. Treatment is limited. Stents may be placed in patients with tumors obstructing the urethra. Radiation therapy in conjunction with NSAID therapy has shown significant survival advantage when compared to pets who did not receive NSAID therapy. The role and/or benefit of chemotherapy is not well understood.

  • Radiation therapy is the medical use of high dose radiation to destroy cancer cells by damaging the cells’ DNA to interfere with cell replication and kill them. It may be used on its own or in combination with other treatments, such as surgery or chemotherapy, or to reduce the size of very large tumors prior to surgery. There are several radiation protocols used in veterinary medicine. Your veterinary oncologist will choose the therapy most appropriate for your pet’s individual situation.

  • Round cell tumors are among the most common skin tumors in dogs, and they typically form just under the skin, although they may change the surface of the skin above them. When caught early, most round cell tumors are removed easily, and surgery is generally curative. The most important take home message is to be vigilant, and to have any skin lumps or bumps assessed by your veterinarian promptly.

  • Salivary cancers are almost invariably malignant tumors originating from the secretory cells of the glands. Other swellings or tumors of salivary glands may be due to infections and cysts.

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