oncology
Mast cell tumors in dogs
Answer
Mast cell tumor treatment typically costs $500 to $5,000 depending on grade and stage. Surgical removal of a single low-grade tumor runs $500 to $2,500. High-grade tumors with chemotherapy or radiation exceed $5,000. Insurance covers mast cell tumors when not pre-existing; once a dog has had one, future tumors at new sites are usually still covered.
Signs to watch for
- 01Skin lump that changes in size, sometimes within hours.
- 02Red, swollen, or itchy mass that the dog scratches.
- 03Lump that releases histamine when manipulated (Darier's sign).
Treatment options
- 01Wide surgical excision with 2 to 3 cm margins.
- 02Histopathology and grading (Patnaik or 2-tier system).
- 03Radiation therapy for incompletely excised low-grade tumors.
- 04Vinblastine, lomustine, or toceranib for high-grade or metastatic disease.
Prognosis: manageable
Typical cost in the US
How insurance handles it
Covered when not pre-existing. Pay attention to bilateral or recurrence wording: a new tumor at a different location is usually treated as a new claim.
Frequently asked
Predisposition is breed-linked. Boxers, Bulldogs, Boston Terriers, and Golden Retrievers carry elevated risk. The KIT gene mutation is involved in many canine mast cell tumors and informs treatment choice.