A vet team understands how difficult it is to discover that your dog is suffering from cancer, as pets are beloved members of our families and often our closest friends. Although no one wants to think about your dog’s suffering, knowing the different types of canine cancer could help you catch the disease early when the treatment is most effective.

Certain types of canine tumors can be treated. They are typically local infiltrating tumors that can be removed surgically. However, there is usually no treatment for cancers that are spread to other parts of your dog’s body or metastasize.

Gathering as many details as possible after discovering that your pet is suffering from cancer before making any decision is essential. An appointment with a vet oncologist can help you understand the potential outcomes and what you should expect for your pet. They will be able to discuss various treatments and the implications for your pet’s life span and overall quality of living.

Dog Tumor Types

In comparison to human cancers, canine tumors are treated differently. It is essential to understand the characteristics of each type of cancer in dogs because different types of tumors are classified differently.

Mast Cell

Mast cells are tumors of cancer that grow within the skin of a dog’s mast cells. The immune system cells comprise typical mast cells. They are responsible for allergic reactions such as hives and insect stings.

Mast cell tumors may have different appearances, like simple cysts or zits. They also have the capability of mimicking benign tumors such as lipomas.


Lymphocytes, also known as white blood cells, are the first to develop cancer known as lymphoma. A vital component of the dog’s immune system is a normal lymphocyte. Complex, large lymph nodes, typically found within the jaw area, in between the shoulders, or behind the knees, are a typical indicator of lymphoma; apathy or a lack of desire to eat are also signs. Contact a veterinary specialist about any surgery for your dog.


Fat cells can lead to benign growths known as lipomas. They usually occur in the fat layer directly under a dog’s skin or under the skin fat.

Lipomas are extremely common and can grow to be quite large. They typically affect the appearance (pet parents might not like how a bumpy, lumpy puppy looks). However, when they’re in the wrong spot, they could cause problems. Liposarcoma is the name given to the malignant tumor’s less common variant.


One type of cancer that arises from bone cells is called osteosarcoma. Osteosarcomas can lead to limb swelling as well as bone fractures and lameness. They can be painful.

Large breeds of dogs, such as Boxers, Golden Retrievers, German Shepherds, Great Danes, Great Pyrenees, Greyhounds, Labrador Retrievers, and Rottweilers are often affected by osteosarcoma.


The benign tumors are formed from histiocytes in the skin. Histiocytes are an immune cell type that assists in the fight against infections. In a matter of weeks, they usually decrease and disappear by themselves.

For puppies, histiocytoma can be expected in puppies. It can be found in any dog breed; however, the most common species are the Labrador Retrievers. Boxers, Shar Peis, Bulldogs, American Pit Bull Terriers, Staffordshire Terriers, and Scottish Terriers. Consult your veterinarian for any pet dental care details you need.


The benign tumors, referred to as papillomas or warts, are caused by the canine papillomavirus. The virus spreads through touching. The most common sites are the lips, gums, or throat, but they may be found in other locations and are common in dogs who play in dog parks, playgroups, or daycares.

Because this virus is specific to a species and is not a threat to you or any other animal living within your household could be infected. Papillomas usually disappear by themselves within just a few weeks. Click here for additional information.