Tumor of the Meninges in Dogs

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Meningioma in Dogs

Meningioma is the most common brain tumor in dogs. It affects a system of membranes that envelops the brain and spinal cord called the meninges. These tumors compress adjacent tissues and may lead to swelling in the affected regions. All breeds are at risk of meningioma, but it is usually seen in dogs older than seven years of age.

Symptoms and Types

The symptoms vary depending upon the location of tumor, but some of the more common symptoms include:

  • Seizures
  • Visual deficits
  • Abnormal behavior or mental state
  • Uncoordinated movements
  • Neck or back pain



The underlying cause for meningioma is currently unknown.


You will need to give a thorough history of your dog’s health, including the onset and nature of the symptoms, to your veterinarian. He or she will then perform a complete physical examination as well as a biochemistry profile, urinalysis, and complete blood count -- the results of which are typically normal. For further analysis, your dog’s veterinarian will also take a sample of cerebrospinal fluid, a protective and nourishing fluid that circulates around the brain and spinal cord.

Magnetic Resonance Imaging and Computed Tomography scan are the two most valuable tools for identification of lesions and its localization. Although tissue biopsies are also frequently used to diagnose meningioma.

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