Brain tumors are a relatively uncommon but significant condition affecting older dogs, though they can occasionally occur in younger patients.
🧠Types of Brain Tumors
Primary brain tumors
Primary brain tumors that arise from the brain and its covering membranes are most common.
- Meningioma: Arising from the meninges (the membrane covering the brain), it is the most common primary brain tumor in dogs.
- Gliomas: The second most common tumor, arising from glial cells (the supporting cells of neurons). Brachycephalic breeds, such as Boxers, French Bulldogs, and English Bulldogs, exhibit an increased predisposition, particularly for gliomas.
Secondary tumors
- secondary tumors that spread from other sites are less frequent
👁️ Clinical Signs and Symptoms
Seizures: Unexpected epileptic episodes.
Behavioral Changes: Staring at walls, disorientation, or house-training accidents.
Physiological Patterns: Altered sleeping patterns or incessant, aimless pacing.
Head Pressing: Where dogs press their heads against walls, which is often a sign of intense, localized headache.
Mobility Issues: Difficulty walking, circling, falling, ataxia (wobbly gait), and head tilt.
💊 Treatment and Medication Management
Prednisolone and pain management
Prednisolone and pain management typically provide marked improvement in clinical signs by reducing tumor-associated edema and inflammation, thereby decreasing compression and neurological symptoms.
Anti-epileptic medications
Anti-epileptic medications are essential for managing tumor-associated seizures.
Prognosis and Radiotherapy Outcomes
Prognosis depends on tumor type, size, location, treatment modality, and severity of clinical signs at presentation.
Specialist in Veterinary Oncology, Dr. Antonio Giuliano, shares that radiotherapy for dogs is currently the most effective treatment for brain tumors, with a median survival of approximately 12–23 months depending on tumor type.
A 2025 study showed dogs with meningiomas treated with radiotherapy had a median survival of 696 days (approximately 23 months) compared to 297 days with surgery alone.
Dogs with gliomas generally have shorter survival times than those with meningiomas. Clinical improvement, quality of life enhancement, and partial response or disease stabilization are commonly observed with radiotherapy in 70–80% of cases, while a complete response is comparatively rare.
| Treatment Method | Median Survival Time |
| Radiotherapy | 696 days (approx. 23 months) |
| Surgery Alone | 297 days (approx. 10 months) |
