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Illustrated Articles
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The two groups of spiders responsible for most medically significant spider bites include the widow spiders (Latrodectus spp., including the black widow spider) and the recluse spiders (Loxosceles spp., including the brown recluse). The clinical signs and treatment of black widow and brown recluse spider bites vary significantly due to differences in their venom.
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Squamous cell carcinoma (SCC) is a tumor of the cells that make up the contact or upper layer of the skin. UV light exposure has been described as a developmental factor in people and appears to be associated with its development in cats. Areas affected include the ear tips, skin, toes, or peri-ocular region. Fine needle aspiration or biopsy may be performed for diagnosis. The metastatic rate does not appear overly clear, though staging is always recommended. SCC of the toe can occur as a primary tumor or may have spread from the lung (lung-digit syndrome). Surgery is almost always recommended in any case of SCC; the role of chemotherapy is controversial. Radiation therapy has an excellent response rate in cats with the SCC affecting the nasal planum and may give long-term tumor control.
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Stem cells are unspecialized cells that are capable of renewing themselves though cell division. Under certain conditions, they can become a specific tissue or organ cell. Stem cell therapy commonly refers to the process of placing stem cells from the body into diseased or damaged tissues, such as a torn ligament in the knee or perhaps an arthritic joint. This process is often referred to as regenerative medicine. Adult stem cells are capable of repair and regeneration of various tissues because they have the potential to differentiate into specialized cells of an organ. The most common use of stem cell therapies has been in the treatment of osteoarthritis in dogs and cats. Currently, there are no current guidelines with respect to stem cell therapy. Stem therapy should only be performed by a veterinarian with special training, who understands the benefits and limits of this therapy. It is important to have realistic expectations as positive outcomes cannot be guaranteed.
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This handout discusses the use of corticosteroid (such as prednisone or dexamethasone) in the cat. Reasons for their use as well as the common short-term and long-term side effects of these drugs are outlined, along with strategies to avoid these effects.
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Stomach tumors are uncommon in dogs and cats. There are many kinds, including leiomyosarcomas, lymphomas, adenocarcinomas, mast cell tumors, fibrosarcomas, plasmacytomas, gastrointestinal stromal tumors (GISTs), and carcinoids (all malignant); and leiomyomas, adenomatous polyps, and adenomas (benign). Most tumors are malignant. Stomach tumors are more prevalent in older animals, males, and certain breeds. The signs of stomach tumors include chronic vomiting, inappetence, lethargy, and weight loss. Sometimes tumor ulceration will cause anemia. Paraneoplastic syndromes are possible with the muscle tumors. Stomach tumors may be diagnosed with imaging, endoscopy, or surgery, with a biopsy. Treatment may involve surgery, chemotherapy, or radiation therapy.
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Administering supplemental fluids can benefit cats with a variety of medical conditions. Giving injections is outside the comfort zone for almost anyone outside the medical profession; however, subcutaneous fluid administration is not nearly as difficult as it sounds. Your veterinary healthcare team will provide you with all the equipment that you will need to administer fluids to your cat. They will go through the steps with you in person. Do not use the fluid bag if cloudiness or discoloration develops in the fluids.
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Home care after surgery mainly involves the restriction of physical activity. Excessive physical activity often leads to injury or serious complications. Monitor the incision daily for signs of redness, swelling, discharge, or excessive licking, and never apply anything to the incision unless instructed to do so. To keep your cat from licking, your veterinarian can provide you with a protective collar or recovery suit. Your cat should gradually improve each day.
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The main objectives of fracture repair are to promote rapid healing of the fracture and to get the cat using its leg as quickly as possible. In most cases, this involves rebuilding the broken bone and fixing it in that position with metallic implants. Post-operative care includes pain medications, antibiotics, adequate nutrition, exercise restriction, and physiotherapy. Most fractures can be repaired very effectively and in many cases, your cat will resume normal activity.
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Skin gland, hair follicle, and sebaceous gland tumors are often benign. Matrical carcinoma and sebaceous gland adenocarcinoma are rare and more aggressive forms of the disease. Regardless of the type (sweat, hair, or sebaceous) diagnosis is made by fine needle aspiration, biopsy, and/or surgical removal and histopathology. Further treatment is reviewed.
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Systemic lupus is a rare disease in cats and most commonly affects Siamese, Persians, and Himalayans. It is caused by immune system dysregulation resulting in the immune system attacking different cells in the body. Skin changes can include ulceration or erosions of the face, ears, or entire body. Other systems affected include the kidneys, joints, blood cells, and the central nervous system. Diagnosis is difficult, requiring the presence of a minimum of three of the 11 criteria set by the American College of Rheumatology. Treatment involves suppressing the immune system with steroids and other immunosuppressive medications. Prognosis is guarded, as treatment to control the symptoms will be needed lifelong and in some cases may not be effective.