FR
ENWhat is a feline brain tumor?
A brain tumor is an abnormal mass inside the skull, affecting the brain or its surrounding structures. They represent about 2 to 3% of all feline tumors, and unlike dogs, meningioma dominates the picture in cats, with a much more favorable biology.
Meningioma: the quintessential feline brain tumor
Up to 75% of primary brain tumors in cats are meningiomas. They originate in the meninges (the membranes covering the brain), not in the brain tissue itself. This makes them often surgically accessible; post-surgical prognosis can be excellent (up to 2 years or more). Male domestic shorthair cats are the most commonly affected.
Other primary tumors
Arising from brain tissue or meninges. Less common than meningioma but important to recognize.
Glioma
InfiltratingAffects glial cells in the brain tissue. More infiltrating, often less surgically accessible.
Choroid plexus papilloma
RareTumor of the choroid plexuses (CSF producers). Can cause hydrocephalus.
Pituitary adenoma
HormonalAffects the pituitary gland. Can cause hormonal imbalances alongside neurological signs.
Adenocarcinoma
MalignantMalignant form from cerebral or pituitary epithelial cells. More guarded prognosis.
Secondary tumors (metastatic)
From a cancer elsewhere in the body that has spread to the brain.
Location → Symptoms
Forebrain
Seizures, behavioral or personality changes, altered alertness, disorientation
Brainstem
Balance abnormalities, gait disorders, cranial nerve dysfunction (face, mouth), respiratory changes
Signs and symptoms: three stages
Symptoms progress gradually based on tumor location and size. In cats, they are often subtle at first and can be mistaken for normal aging.
Early stage
- Vomiting or excessive drooling without apparent cause
- Progressive weight loss
- Changed appetite (increased or decreased)
- Sudden collapse or weakness
- Bumping into walls or furniture (disorientation)
- Standing pressed into corners (abnormal positioning)
- Eliminating outside the litter box without apparent reason
Intermediate stage
- Depression, loss of interest in surroundings
- Head tilt, loss of balance
- Reduced or lost vision
- Swallowing difficulty
- Changed vocalizations (unusual meowing)
- First intermittent seizures
- Restless nighttime behavior (vocalizing, wandering)
Advanced stage
- Sudden, unexplained aggression
- Excessive sleepiness, stupor
- "Absent" behavior, blank stare
- Extreme clinginess or complete withdrawal
- Circling, pressing against walls
- Tremors, muscle twitching, incoordination
- Facial paresis (drooping eyelid or lip)
- Food falling out of mouth (inability to chew properly)
When to go to an emergency vet immediately?
These situations require immediate veterinary emergency care:
- Respiratory distress: panting, difficulty breathing
- Sudden collapse or loss of consciousness
- Repeated or prolonged seizures (status epilepticus)
- Uncontrollable vomiting or diarrhea
- Extreme pain: unusual vocalizations, crying
- Uncontrollable behavior endangering the cat or people nearby
How is the diagnosis made?
As with dogs, diagnosing a feline brain tumor follows a funnel approach: from accessible, non-invasive tests to advanced imaging confirming the intracranial lesion.
Clinical and neurological exam
Assessment of reflexes, balance, gait, cranial nerves. Allows approximate localization of the affected brain area before imaging.
Full blood panel
Biochemistry, hematology, thyroid hormones (hyperthyroidism can cause similar signs). To assess general health and rule out metabolic causes.
Chest radiographs
Check for pulmonary metastases: essential to determine if the tumor is primary or metastatic.
Abdominal ultrasound
Screen for primary tumors elsewhere (liver, spleen, kidneys) that may have spread to the brain.
MRI or CT scan
The reference exam. Under general anesthesia, it precisely localizes the mass, evaluates its extent, and guides treatment decisions. Available at specialized centers.
Treatment options: from curative to palliative
Treatment depends on tumor type, location, the cat's general health, and practical possibilities. Here are the four main options, often combined.
What to expect: survival and quality of life
Most feline brain tumors are not curable long-term, but several can be managed long enough to provide a good quality of life. Early detection remains the single most determining factor.
Factors influencing prognosis
- Histological type: meningioma vs malignant glioma vs metastasis
- Location: accessible vs deep / brainstem
- Tumor size and effects on adjacent structures
- Timing of diagnosis and treatment
- General health and anesthesia tolerance
- Primary vs secondary (metastatic) tumor
Home comfort and management
Your presence and daily attention are as important as medical treatment. An adapted environment reduces injury risk and preserves your cat's quality of life.
Adapting the environment
- Food and water easily accessible, optionally elevated
- Gentle ramps or steps to reach favorite spots
- Non-slip surfaces (rugs) to reduce slipping
- Gates at stairs, balconies, and bodies of water
- Night lights for a disoriented cat
- Quiet, secure resting areas away from noise
Daily helpful actions
- Strictly follow medication schedules (corticosteroids, anticonvulsants)
- Monitor weight, appetite, and energy
- Keep a journal of good and bad days
- Approach slowly, alerting the cat to your presence (especially with vision or hearing impairment)
- Avoid sudden stimuli (abrupt movements, bright lights, sharp sounds)
- Minimize stress: inter-cat conflict, noise, routine changes
- Limit intense play if balance is impaired
- Cognitive supplements (omega-3, antioxidants) on veterinary advice
- Regular veterinary check-ups per the agreed protocol
What to avoid
- Modify or stop medications without veterinary advice
- Allow unsupervised access to stairs, balconies, or pools
- Ignore worsening symptoms or new seizures
- Subject the cat to rough play or overstimulating games during seizure periods
Frequently asked questions
Can meningioma be cured in cats?
How do I tell a brain tumor apart from normal aging?
Is MRI truly necessary?
My cat is elderly: are intensive treatments worth it?
Does stress worsen the disease?
How do I know if my cat is in pain?
This guide is provided for informational and educational purposes only. It does not constitute veterinary medical advice. Every cat is unique; diagnosis, treatment, and follow-up must be tailored to each individual case. If you have concerns, contact your veterinarian promptly.