Brain Tumors in Cats

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While brain tumors in cats remain fairly uncommon, it is an issue that occurs, and that can sometimes be treated effectively. A tumor is defined as an abnormal growth of cells, and may be classified as primary or secondary. A primary brain tumor originates from cells normally found within the brain and its membranes. A secondary brain tumor, on the other hand, is one that has metastasized to the brain from a primary tumor elsewhere in the body, or that is affecting the brain by extending into brain tissue from an adjacent non-nervous system tissue, such as bone. A tumor may be either malignant (cancerous), or benign.

No specific breed of cat seems to be particularly susceptible to brain tumors, although older male cats appear to be the most likely to develop benign tumors originating from the membranes covering the brain (meningiomas).

Symptoms and Types

The most common indication of a brain tumor in cats is seizures, especially seizures that begin to occur after the cat has reached at least five years of age. There are other signs which may suggest a brain tumor, including abnormal behavior and mental status, changes in habits or learned behaviors, head pressing, over-sensitivity to pain or to being touched in the neck area, bumping into objects and doorways, and vision problems that lead to circling motions, uncoordinated movement and ataxia (drunken gait). Cats may also vocalize, or meow, more, and may not purr as frequently.

Causes

The causes and risk factors that may cause brain tumors in cats are unknown. It is speculated that various dietary, environmental, genetic, chemical, and immune system factors may be involved, but this is uncertain.

Diagnosis

Your veterinarian will perform a thorough physical exam on your pet, taking into account the background history of symptoms and possible incidents that might have precipitated this condition. Injury or trauma to the head can cause an accumulation of fluid in the skull, mimicking a tumor in outward appearance and effect. You will need to provide a thorough history of your pet's health leading up to the onset of symptoms. A tissue biopsy is the only definitive method for diagnosing brain tumors in cats. In addition, magnetic resonance imaging (MRI) scans can reveal tissue irregularities in the brain, while X-Ray and ultrasound imaging can be used to locate or rule out primary tumors in other areas of the body.

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malignant

Something that becomes worse or life threatening as it spreads

prognosis

The prediction of a disease’s outcome in advance

radiation therapy

A treatment of certain neoplasms that is administered using an x ray

gait

The term used to describe the movement of an animal

edema

The collection of fluid in the tissue

benign

Not being able to cause harm; the opposite of malignant.

biopsy

The process of removing tissue to examine it, usually for medical reasons.

ataxia

A medical condition in which an animal is unable to control the movements of their muscles; may result in collapse or stumbling.

Courtesy of petmd.com Original Article

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