Can astrocytoma cause seizures?

Yes. Brain tumours can irritate the cerebral cortex and trigger seizures, ranging from brief muscle twitches to generalised convulsions. Your vet can arrange a neurological assessment and imaging evaluation.

How does the vet confirm a brain tumour?

Diagnosis typically involves a neurological examination combined with MRI or CT imaging to assess the location and size of the lesion. A tissue biopsy may be needed to confirm the histopathological diagnosis. Referral to a specialist centre is recommended.

What should I record at home when my pet has a seizure?

Note the time the seizure started, how long it lasted, what it looked like during the episode, and how long recovery took. Video recordings are especially helpful. Bring all this information to your appointment.

How often is imaging follow-up needed after treatment?

Follow-up intervals depend on the treatment method and disease progression. Imaging is commonly scheduled within a few months to a year after surgery or radiation therapy. Follow your specialist vet's recommendations.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Astrocytoma in Dogs & Cats: Seizures, MRI Diagnosis & Home Care [2025]

Astrocytoma is a primary brain tumour. Signs include seizures and behavioural changes; prognosis depends on tumour grade and location.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: AVMA, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Seizure lasting several minutes without stopping, with clouded consciousness
•Unable to be roused or unresponsive for a prolonged time after a seizure
•Difficulty breathing or lips that turn noticeably pale and stay that way

Arrange a clinic visit as soon as possible (within 24-72 hours)

•Increasing number of seizures with shorter intervals between them
•Sudden change in behavior or personality, becoming withdrawn
•Unsteady walking, frequent falling, or a noticeable head tilt

01What symptoms signal a problem?

Brain tumours such as astrocytomas often present as neurological signs. Owners commonly notice seizures, altered consciousness, and behavioural changes, which may also affect balance and appetite.

Intermittent or continuous seizures, which may begin focally and spread
Brief episodes of disorientation or altered consciousness, slowed responses, or a vacant stare
Sudden changes in behaviour or personality, such as becoming fearful or withdrawn
Unsteady gait, frequent falls, or head tilt with reduced coordination
Recurrent vomiting or notable changes in appetite or water intake

Seek emergency care immediately if you notice the following symptoms:

⚠️ Seizure lasting several minutes with no sign of stopping and ongoing loss of consciousness
⚠️ Pet cannot be roused or remains unresponsive for an extended period after a seizure
⚠️ Breathing difficulty or persistent pale or white gums

02What to watch at home: self-assessment and emergency criteria

Keeping a home observation log helps your vet assess disease progression and seizure patterns. Maintain a calm, low-stimulation environment and record observations consistently.

Record the start and end time of each episode, and how often they occur
Film seizures or abnormal behaviour on your phone and note the timestamp
Keep a daily log of appetite, water intake, and any changes in elimination
Observe energy levels and mental alertness throughout the day and note specific details
Track the frequency of head tilting, falling, or loss of balance
Contact your vet promptly if symptoms worsen or emergency signs appear

03How does the vet make a diagnosis? Common diagnostic tests

The vet will begin with a neurological and full-body assessment, then arrange blood work, imaging, or pathology testing as needed to confirm the diagnosis and extent of disease.

Physical examination and thorough neurological assessment to identify affected brain regions

Blood and biochemistry panel to rule out metabolic and systemic conditions

MRI (magnetic resonance imaging)

preferred modality for detailed evaluation of brain lesions

CT (computed tomography)

used as supplementary imaging when MRI is unavailable

Brain tissue biopsy or surgical sampling for histopathological diagnosis

Referral to a specialist centre with MRI capability and neurosurgical experience is recommended

04Treatment and aftercare: medications, diet, and home management

Treatment approach depends on lesion location and overall health. Long-term follow-up is required for post-operative care and medical management, along with home environment adjustments.

Surgical resection or debulking is evaluated by a neurosurgeon based on tumour accessibility
Radiation therapy or chemotherapy may be considered on a case-by-case basis in consultation with a specialist
Long-term anti-epileptic medication to control seizures, with regular follow-up as directed by your vet
Minimise environmental stimulation and introduce staged rehabilitation during post-operative or conservative management
Continue logging seizure frequency and symptom changes to guide treatment adjustments
Regular imaging follow-up is recommended to monitor lesion progression

05What to prepare before your appointment: key information to help your vet quickly identify the cause

Note the date of the first episode and the date and time of each subsequent seizure

Bring video recordings of seizures or abnormal behaviour with timestamps

Prepare a log of recent changes in appetite, water intake, and elimination habits

List all current medications, supplements, and dosages

Bring any previous imaging files and diagnostic reports if available

Use a secure carrier and minimise vibration during transport

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.