Educational Articles

Tumors

  • Mast cells originate or are formed in the bone marrow but complete their maturation in peripheral tissues. They are found in all tissues of the body but concentrate near surfaces in contact with the external environment such as the skin, respiratory and digestive tracts.

  • Squamous cell carcinoma in situ is a disordered growth of the skin epidermis that may extend to include epithelium of the upper part of the hair follicles.

  • The phrase ‘multidrug resistance mutation 1 (MDR1)’ refers to a specific mutation that can occur at a gene known as the MDR1 gene, also known as the ABCB1 gene. Many herding breeds (most commonly Collies and Australian Shepherds) have a mutation at the MDR1 gene that makes them more sensitive to the negative effects of certain medications.

  • In some cases, chronic inflammation of the nose (rhinitis) leads to proliferation (hyperplasia) and formation of polyps in the nose or throat. These polyps are not cancerous but may need removal.

  • Neuroendocrine cells produce specialized chemical substances called “neuroendocrine hormones”. These hormones affect the rates of specific chemical reactions in nearby cells or in other tissues throughout the body.

  • Neuroendocrine cells produce specialized chemical substances called “neuroendocrine hormones”. These hormones affect the rates of specific chemical reactions in nearby cells or in other tissues throughout the body.

  • Oral papillomas (warts) are benign tumors of the epithelial lining of the mouth and throat caused by papillomaviruses. The esophagus may also be affected in severe cases.

  • Squamous cell carcinomas are malignant cancers originating from the lining cells of the mouth. They are locally invasive and often recurrent.

  • Like us, dogs can develop oral masses. Some will grow slowly and won’t spread to other locations (benign), while others will spread to different areas of the body causing great harm (malignant).

  • Osteosarcoma is the most common malignant bone tumor diagnosed in veterinary practice. It is considered similar to pediatric osteosarcoma in humans, a bone cancer that usually develops during the period of rapid growth that occurs in adolescence, as a teenager matures into an adult. Osteosarcoma is considered a rare cancer in cats.

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The telephone number at the Emergency Veterinary Clinic is 905-495-9907.