Articles
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Carpal hyperextension is an abnormality of the carpus (wrist) that causes increased extension of the joint. Carpal hyperextension in cats is typically caused by trauma. Cats can also develop carpal hyperextension in association with other systemic diseases (e.g., inflammatory arthritis, diabetes mellitus, electrolyte abnormalities). Cats with carpal hyperextension have a noticeable bend at the wrist, forcing their foot into an abnormally flattened position. If carpal hyperextension is caused by trauma, it may also be associated with pain and swelling. A tentative diagnosis of carpal hyperextension can be made based on initial observation, but a thorough physical examination is necessary because cats with carpal hyperextension may also have abnormalities in other joints. X-rays and other additional tests may be recommended. Treatment of carpal hyperextension depends upon the severity of the condition and may involve surgery.
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Carpal laxity is a condition in which the carpus has an abnormal or excessive range of motion. Carpal laxity can show up in one of two ways: carpal hyperextension or carpal flexion. The underlying cause of carpal laxity has not been definitively determined but may be caused by nutritional factors, genetic factors, and being raised on slippery flooring surfaces. Signs of carpal laxity may be seen at any time from 6 weeks of age onward, but the condition is most commonly noted between three and six months of age. Activity modification is often recommended for affected kittens by keeping them off slippery surfaces. Most kittens with carpal laxity will appear completely normal within six to eight weeks.
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A cataract is an increase in opacity of the eye’s lens. Any type of inflammation or damage to the lens can lead to a cataract. The clinical signs of cataracts vary depending on the size of the cataract; many cataracts are asymptomatic at the time they are diagnosed during a veterinary exam. The ideal treatment for cataracts is surgery, but not all cats are candidates for surgical treatment. In these cases, anti-inflammatory medications may be used to prevent glaucoma and other secondary complications of cataracts.
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Cerebellar hypoplasia is a developmental condition in which the cerebellum of the brain fails to develop properly. It most commonly occurs when a pregnant cat becomes infected with feline panleukopenia virus and passes the infection to her unborn kittens. Since the cerebellum is responsible for purposeful movement and coordination, the symptoms of this condition may not become apparent until the kitten starts to try to stand or walk on its own. There is no treatment; however, kittens with cerebellar hypoplasia are not infectious to other kittens or cats, are not in any pain, and will learn to adapt to their disability over time.
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Chediak-Higashi Syndrome is a rare genetic disease of smoke-blue Persian cats. The condition affects how the body processes waste products, resulting in changes within the body’s cells and leading to abnormal pigmentation of the skin and coat. The condition can lead to eye abnormalities and problems with blood clotting, but most cats can have a normal lifespan with careful health monitoring.
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Coccidioidomycosis is a fungal disease caused by the soil fungus Coccidioides immitis or Coccidioides posadii. The early signs of coccidioidomycosis include fever, lethargy, poor appetite, coughing, and joint pain. Diagnosis is by biopsy of lesions or blood testing for antibodies to the Coccidioides organism. The prognosis for recovery is dependent of the extent of lesions in the cat’s body.
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Coonhound paralysis is a sudden inflammation of multiple nerve roots and peripheral nerves in dogs, and occasionally cats. It can be caused by an immune reaction to raccoon saliva. It can also occur in dogs who have not encountered a raccoon. In this case, it is called acute idiopathic polyradiculoneuritis, and its cause is often unknown. Dogs with coonhound paralysis start out with a stiff-legged gait that rapidly progresses to paralysis of all four legs. Good nursing care is essential for recovery.
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Corneal lipidosis is an accumulation of fatty substances within the cornea. This is caused by genetics (corneal dystrophy), eye inflammation (corneal degeneration), or by an increase in circulating lipids in the body (hyperlipidemia). Visually, lipidosis appears as a sparkly or shiny area of the cornea. It is diagnosed by a thorough eye exam, bloodwork, and patient history. Treatment and prognosis will depend on the cause and may include treatment of underlying inflammatory conditions of the eye, or systemic treatment of elevated lipid blood levels.
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Ulcerative keratitis is inflammation in the cornea of the eye. The signs of ulcerative keratitis depend somewhat on the cause and how long the condition has been present. There are many potential causes of ulcerative keratitis, including trauma, infection, and abnormal tear production. Antibiotic ointment or drops will be prescribed and it is important to prevent additional trauma to the cornea. Superficial corneal ulcers typically heal within 5 to 7 days. Deeper or more complicated ulcers may take several weeks to heal and may require surgery in addition to medical treatment.
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Crystalluria refers to the presence of crystals in the urine. These crystals are made up of minerals and other substances that would normally be dissolved in the urine; crystals form when these substances do not remain dissolved in the urine and instead coalesce (join together) into crystals. Crystalluria is diagnosed via urinalysis.
