Brain Tumor (Astrocytoma) in Cats

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Astrocytoma in Cats

Although rare in cats, astrocytomas can be dangerous, even deadly. These tumors affect the brain's glial cells, which surround nerve cells (neurons), giving them support and electrically insulating them. Astrocytomas can also be rarely found in the spinal cord, and there was one reported case of an astrocytoma located in the retina.

Symptoms and Types

The astrocytoma's biologic behavior depends on the tumor's location and degree of lack of cell differentiation (graded I–IV, from best to worst prognosis). The following are some common symptoms associated with this type of brain tumor:

Seizures
Behavioral changes
Disorientation
Loss of conscious proprioception (i.e., clumsy misplacement of feet, tripping, etc.)
Cranial nerve abnormalities
Paralysis

Causes

The underlying cause for the development of astrocytomas is currently unknown.

Diagnosis

You will need to give a thorough history of your cat’s health, including the onset and nature of the symptoms, to the veterinarian. He or she will then perform a complete physical examination as well as a biochemistry profile, urinalysis, complete blood count, and electrolyte panel to rule out other diseases.

An analysis of cerebrospinal fluid may indicate increased protein levels without an increase in cell count, which is indicative of astrocytoma development. Computed tomography (CT) and magnetic resonance imaging (MRI) are also highly instrumental in diagnosing astrocytomas, as is radionuclide imaging, which may show an area of increased activity at the tumor site.