Companion Animals

Dog Mast Cell Tumour: Prognosis, Treatment and Quality of Life

Mast cell tumours are the most common skin cancer in dogs, with welfare outcomes highly dependent on grade and treatment approach.

Key Facts

Mast cell tumours occur most commonly in Boxers, Pugs, and Golden Retrievers
Grade I tumours have excellent prognosis with surgery; Grade III are highly aggressive
Toceranib phosphate (Palladia) provides palliative benefit in inoperable tumours
Systemic degranulation from tumour manipulation causes acute anaphylactic welfare emergencies

Welfare Considerations

Mast cell tumour degranulation during manipulation causes acute pain and anaphylaxis. Surgical planning that minimises tumour handling and uses appropriate margins prevents local recurrence. Grade-appropriate treatment decisions that balance quality of life with treatment intensity improve welfare outcomes.

What You Can Do

Have all skin lumps on dogs assessed by a vet - do not aspirate at home
Request grade assessment after removal to guide whether further treatment is needed
Discuss palliative options with an oncologist for inoperable or high-grade tumours