Unidentified lumps and skin tumors in dogs can be benign or serious. Only your veterinarian can confirm a diagnosis. The earlier you identify and treat dangerous skin tumors, the better the outcome, and early confirmation of a benign condition saves a great deal of worry and stress.
Certain injuries and conditions can mimic tumors. Cysts, skin tags, fatty deposits under the skin and wound-related abscesses can cause suspicious lumps to appear on or under your dog's skin. These are not cancerous and may or may not need veterinary attention.
Types of Skin Tumors
Some skin tumors in dogs are benign (non-metastasizing) cancer growths. Keratoacanthomas fall into this category. They can be removed and generally will not regrow. Grade I mast cell tumors are not benign but have a high cure rate. Higher grades are more dangerous and likely to recur.
Melanomas are the most serious of skin tumors. Melanomas may appear on the skin, toes or mouth. They may be pigmented or not. Surgical removal and chemotherapy are recommended.