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Myelopathy–Paresis/Paralysis in Cats

Myelopathy refers to any disease affecting the spinal cord. Depending upon the severity and location of the disease, it can cause weakness (paresis) or complete loss of voluntary movements (paralysis). Paresis or paralysis may affect all four of the cat's limbs (teraparesis/plegia), the hind limbs (para-), front limbs (hemi-), or just one limb (mono-).

Symptoms and Types

The severity and extent of the spinal cord disease, as mentioned above, will determine how severe the weakness and paralysis is. However, external stimuli will also often increase the effects. Such symptoms include:

• Uncoordinated movements
• Loss of muscle bulk
• Decreased tension of muscles (Hypotonus)
• Increased tension of muscles (Hypertonus)
• Bowel movement and urinating problems (fecal and urinary incontinence, respectively)

Causes

• Inherited
• Blood supply deficiency (ischemia)
• Neoplastic tumor(s)--lymphoma, meningiomas, histiocytic tumors, etc.
• Inflammatory and infectious—Bacterial meningomyelitis, Cryptococcus neoformans, FeLV
• Traumatic—secondary to bite wounds, vertebral fractures, or intervertebral disc disease

Diagnosis

You will need to give a thorough history of your cat’s health to your veterinarian, including the onset and nature of the symptoms. He or she will then perform a complete physical examination as well as a complete blood count, biochemistry profile, and urinalysis -- the results of which are typically within normal ranges. Your veterinarian will also test the cat for various infectious diseases like Feline Leukemia Virus (FeLV) and Feline Immunodeficiency Virus (FIV).

For further evaluation, the veterinarian may conduct CT-scan, MRI (magnetic resonance imaging), and X-rays on the spine, which often reveal underlying problems like fractures, inflammation, and tumors. Meanwhile, a sample of cerebrospinal fluid, a protective and nourishing fluid that circulate around brain and spinal cord, may be sent to a laboratory to test for infectious organisms.