What Are the Different Types of Cancer in Dogs?

Juliet D'cruz

Updated on:


Unfortunately, almost half of all dogs over the age of 10 years old will develop cancer. It is essential to know the signs of cancer in dogs to get cancer treatment fast.

Like with humans, there can be different types of cancer in dogs. Cancer treatments are also available for dogs, thanks to veterinary oncology. Don’t forget to provide your pet with the best care possible by purchasing dog insurance to cover the costs of treatments and medication. And if you recognize signs a dog is in pain, you can do everything possible to make it more comfortable for them.

Read on to learn some of the common types of cancer in dogs.

Mast Cell Tumors (MCT)

MCT is when healthy cells join together and become a mass. It commonly appears as a skin lump but can also happen in areas such as the respiratory tracts. It can be easily treatable with surgery, but it can also spread aggressively. So like with any signs of cancer, get it looked at as soon as possible.


Melanoma is associated with melanocytes, which are pigment cells. Oral melanoma is one of the most common types of cancer in dogs and appears in the oral cavity. The growth can look dark or pink and can spread to other parts of the body fast.

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There are different types of bone cancer, but osteosarcoma is one of the most common in dogs. Amputation and chemotherapy are usually involved, but cancer can still recur.

It sadly can shorten life expectancy by two or three years. Treatment aims to make the dog as comfortable as possible and addresses any signs that a dog is in pain.

Malignant Lymphoma

Malignant lymphoma enlarges lymph nodes in different areas of the body. There can be positive outcomes with cancer treatment, such as chemotherapy for around six months. If you are thinking “my dog is in pain though,” check out CBD oil for dogs with lymphoma, which can help.


Hemangiosarcoma develops from blood vessels, and tumors occur in the spleen, heart, and liver. It is highly malignant and spreads fast, so it often advances before signs of cancer are recognized. Like all types of cancer in dogs, any breed can be susceptible, but breeds like retrievers can be predisposed to this cancer.

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Mammary Gland Carcinomas

Breast cancer also occurs in dogs. Dogs usually have five pairs of mammary glands, and cancer can occur in any of them. Female dogs who were not spayed or were spayed after two years old can be more likely to develop mammary tumors.

Know the Types of Cancer in Dogs

Knowing the types of cancer in dogs will ensure you know the signs a dog is in pain and take action fast. It is best to take your dog to the vet for routine checkups, as they have the experience to recognize signs of cancer. They will also know the best cancer treatment options for your dog.

The good news is that cancer treatment continues to develop, so many types of cancer in dogs can be treated, and your dog can continue to live a healthy life.

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