You might not give much thought to dog skin cancer, because your loyal companion is covered with hair and protected from the sun. But you should know that skin tumors, which may be cancerous, are the most common tumors found in dogs. Fortunately, when caught early, many cases of dog skin cancer can be treated successfully.

1. You might not give much thought to dog skin cancer, because your loyal companion is
covered with hair and protected from the sun. But you should know that skin tumors, which
may be cancerous, are the most common tumors found in dogs. Fortunately, when caught
early, many cases of dog skin cancer can be treated successfully.
how to train your dog’s brain
Not all varieties of dog skin cancer are caused by sun exposure, but sun damage to the skin
can be a factor. All dogs have certain areas, such as the nose and the ears, where there is no or
little hair to shield sensitive skin from the sun. Additionally, pooches with light-colored or
thin coats are more susceptible to sun damage over their entire bodies.
Because some types of dog skin cancer, including dog melanomas and mast cell tumors, are
fatal if untreated, it is important that you have your veterinarian check any suspicious
growths.
Types of Skin Cancer in Dogs
There are different types of dog skin cancers. Three of the most common include:
Malignant melanoma
Just as in people, malignant melanoma is a type of skin cancer in dogs that affects pigmented
cells known as melanocytes. Dogs often develop benign tumors in pigmented cells that do not
metastasize, which are called melanocytes. These tumors are found in areas of the dog’s body
that have hair.
how to train your dog’s brain

2. Most malignant melanomas occur on the mouth or mucous membranes, although about 10%
of the time they are found on parts of the body covered with hair. They tend to grow
extremely fast and are likely to spread to other organs, including the lungs and liver.
How to Treat Diarrhea in Dogs
No one knows exactly why melanomas develop, although genetic factors seem to play a role.
Additionally, trauma or compulsive licking of a particular spot on the skin may increase the

3. likelihood that cells will multiply, thereby raising the chances that cells will mutate during the
division process and become cancerous.
Squamous cell carcinoma
This form of dog skin cancer is often caused by exposure to the sun. Scientists believe there
may also be a connection between the papillomavirus and the development of squamous cell
tumors in certain dogs.
Although squamous cell cancers do not spread to surrounding lymph nodes, they are
aggressive and may lead to destruction of much of the tissue around the tumor.
Mast cell tumors
These dog skin cancers, which occur in the mast cells of the immune system, are the most
common skin tumors in canines. Veterinarians don’t know what causes mast cell tumors to
develop, although there have been cases where they have been linked to inflammation or
irritants on the skin. Evidence suggests genetic factors are often important, and the hormones
estrogen and progesterone may also affect cancer growth.
Dog Skin Cancer: Which Breeds Are
at Risk?
All dogs can get skin cancer, but certain types of cancer more commonly occur in
particular breeds.
Benign melanocytomas are often seen in Vizslas, Miniature Schnauzers, Doberman Pinschers,
Airedale Terriers, and Bay Retrievers, typically in animals between 5 and 11 years old.
Malignant melanomas on the toe or in the toenail bed appear more frequently in black dogs.
Schnauzers and Scottish Terriers are at greatest risk.
how to train your dog’s brain
Squamous cell carcinomas tend to appear in dogs that are between six and 10 years old.
Breeds that are more likely to get this type of skin cancer include Keeshonds, Standard
Schnauzers, Basset Hounds, Collies, Dalmatians, Bull Terriers, and Beagles. In general, dogs
with short coats (especially those with light skin) are more prone to squamous cell
carcinomas.
Mast cell tumors are most commonly seen in Boxers and pugs, and are also found with some
frequency in Boston Terriers, Labrador Retrievers, Beagles, and Schnauzers.

4. Signs and Symptoms: How to Spot
Skin Cancer in Dogs
Dog skin cancer symptoms depend on the type of cancer it is and where the tumor is located
on your dog’s body.
Melanomas
Benign melanocytosis may range in size from very small to more than 2.5 inches in diameter.
They appear on areas of the skin covered with hair and maybe black, brown, gray, or red in
color. Malignant dog melanomas tend to occur in the mouth, on the lips, and in the toenail
beds, and pads of the feet. When dog melanomas occur in the feet, they often become
infected, leading to misdiagnosis as a simple infection.
Squamous cell carcinomas
These tumors are firm and raised with a wart-like appearance. They often occur on the
abdomen and around the genitals. When they occur on the feet, they may be painful and cause
your dog to limp.
Mast cell tumors
These skin cancers in dogs are typically slow-growing and rubber-like. More aggressive mast
cell tumors grow faster and may ulcerate, leading to the development of sore, inflamed areas
on the dog’s body. Mast cell tumors most commonly occur on the trunk of the body, though
they are found on the legs about 25% of the time.
Treatment Options for Dog Skin
Cancer
The treatment depends upon the type of tumor and its location.
Surgery is often the first step for malignant melanomas. If the melanoma cannot be removed
in its entirety or if it has spread to nearby lymph nodes, radiation is commonly used. In these
situations, the cancer may go into remission nearly 70% of the time, though recurrence is
common. Chemotherapy is often used in combination with surgery and/or radiation therapy.
There is also a vaccine that causes the dog’s own immune system to attack tumor cells, which
often successfully extends the survival time of dogs with oral melanoma.
how to train your dog’s brain
Squamous cell carcinomas can often be removed surgically, with no need for radiation or
chemotherapy. If the tumors occur in inoperable locations, photodynamic therapy and the use
of a drug called piroxicam may be beneficial.

5. Dog mast cell tumors are best treated by surgical removal with or without radiation therapy,
depending on the size and location of the skin cancer. Based on the grade of cancer and the
degree to which it has spread, chemotherapy and/or steroids may be used, as well.