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Full Guide To Pet Cancers & TumorsFull Guide To Pet Cancers & Tumors

This guide was created to raise awareness about pet cancer and educate people about this treatable disease.

guide to pet cancers-labrador-vet-holistapetThis full guide to pet cancers & tumors will teach you to the facts of the disease and how to find symptoms early, before it’s too late. Finding cancer in its early stage is the single most important aspect of treating the disease to ensure the longevity of your pet’s life.

In this guide to pet cancers let’s first look at what exactly this disease is and then reveal the many different types of cancers that can affect your pet. Finally, we can show you how to prevent this disease and extend the life of your loved ones.

Here are some truthful facts about pet cancer:

  • More than 50% of disease-related deaths are caused by cancer.
  • 1 out of every 4 dogs will develop a tumor by the age of 10 yrs.
  • 12 million dogs and cats will be diagnosed with cancer this year.
  • 50% of dogs over the age of 10 will develop cancer.
  • By being proactive and raising awareness we can change the odds on pet cancer occurring in our pets.
  • Early identification of pet cancer could be the difference between life and death for your pet.
  • Early warning signs are very similar to those warning signs in people.

The most important fact that you should keep in mind is that 50% of all cancers are curable if caught and treated early.

What Exactly is Cancer?

Cancer is defined as the uncontrolled growth of abnormal cells. These cells invade surrounding body tissues and spread to other areas within the body. Cancer is often described as a diverse group of diseases with many different causes. Each case of cancer is unique, which makes it very difficult to understand and hard treat. It can be centralized, like a tumor or generalized, meaning it’s spread throughout the body.

guide to pet cancers dog cancer signs of tumors holistapet

List of the Different Types of Cancer & Tumors in Dogs (Canines):

Below is a collective list of types of cancer and tumors found in dogs. You will find more detailed info on the most common types of cancer in dogs outline below this list.

  • Testicular
  • Canine Prostatic Disease
  • Fibrosarcoma
  • Histiocytic sarcoma
  • Insulinoma
  • Pancreatic Cancer
  • Thyroid Carcinomas
  • Insulinomas

The Most Common types of Cancer & Tumors in Cats (Felines):

Below is a collective list of types of cancer and tumors found in cats.


cancer diagram tumor cells dividingSome Common Types of Dog Cancer & Symptoms Explained


Lymphoma is a type of cancer born in lymphocyte cells (type of white blood cells in the immune system) in the lymphatic system.  Lymphocytes are white blood cells, which are crucial to fighting off antigens and destroying bad and unwanted cells.  Lymphoma cancers make for about 20% of malignant tumors in dogs. This cancer is more prevalent in certain breeds such as boxers, Saint Bernard’s, Golden Retrievers, Bulldogs, Scottish Terriers, Airedale Terriers & Basset Hounds. Lymphomas are usually found in the organs that help the immune system such as the lymph nodes, thymus gland, spleen, and in bone marrow.

There are 30 different types of Lymphoma cancers. In this guide to pet cancers, we can only brief you with the most common ones. Some of these most common forms are Mediastinal lymphoma, Extranodal lymphoma, and Alimentary lymphoma.

Symptoms of Lymphoma vary depending on what stage the tumor is in. The general symptoms of Lymphoma are lack of appetite, weakness, lethargy, and weight loss.

dog cancer in vetHemangiosarcoma

Hemangiosarcoma is commonly found in dogs more than any other species. This tumor is found in the cells that line blood vessels and is usually diagnosed in the spleen, heart, and liver but can sometimes spread to any organ. There is no early warning or signs of this disease so sadly, it usually goes undetected until it has reached the advanced stages of maturity. This cancer is more common amongst German shepherds, golden retrievers, and other large breed dogs. This type of cancer develops over time and is not painful.

Symptoms come fast and are usually because of sudden blood loss from internal bleeding due to a ruptured tumor. These symptoms include shock, sudden weakness, difficulty breathing, and paled gums.


Osteosarcoma is a very aggressive bone tumor commonly found in the long bones or front and rear limbs of the dog but can also be found in any bone including the rides and skull. This common form of cancer is usually present in large breed dogs such as Great Danes, Saint Bernards, Great Pyrenees, Irish Wolfhounds, Rottweilers, Labradors, Golden Retrievers Newfoundlands, Bernese Mountain Dogs & Dobermans.

Symptoms of Osteosarcoma usually show with large tumors in the limbs and bone swelling. Lameness and limping of the limbs are common signs. Fractures at the tumor site commonly occur because of weakened bones.

HolistaPet Customer Testimonials - Cancer & Tumors

Read what our customers have to say about Holistapet products. Here are some recent testimonials from owners of pets with different Cancer & Tumor related conditions.

guide to cancer in dogsMast Cell Tumor (MCT or Mastocytoma)

Mast cells are cells that reside in the connective tissue of the body usually within the skin, nose, tongue, and mouth. Tumors can occur in these tissues and are graded on a scale of 1 to 3 depending on the location, how inflamed they are, and how different they are than normal healthy mast cells. These tumors are called mast cell tumors or Mastocytoma’s. They are more common in pugs, Boston terriers, boxers, and bulldogs. These masses may be itchy or inflamed and can occur as solitary lumps or masses.

Mast cell tumor symptoms include a skin mass that turns red after touching it. An inflamed area of the skin that changes size; gets larger, then smaller. Severe cases may include vomiting, loss of appetite, and diarrhea.



Melanoma is the most common type of oral cancer that affects the pigmented cells found in canines. Specific breeds with darker pigmented mouths and tongues are at higher risk of the disease. It can spread to lymph nodes of the head and neck but mainly resides in the mouth and oral cavity of the dog. These tumors tend to grow fast and spread to other organs including the lungs and liver. The appearance of these tumors can vary from a small tumor on the skin from 1/4 inch to 2 inches or even larger to any size. The tumor is usually hairless and ulcerated and will be dark grey, brown, or black.


Mammary Carcinoma

Mammary Carcinoma is a cancer found in female dogs that aren’t sprayed or sprayed after reaching 2 years of age. 50% of mammary tumors are malignant and have already spread to other parts of the body by the time that they are removed. Poodles, toy dachshunds, and terrier are more likely to get the disease.

Symptoms are often overlooked because the tumors can appear to be small nodules around the nipple. pain, ulceration, and inflammation on the exterior of the skin. Some stages of advanced metastasis cancer will spread to the lymph nodes, liver, lungs, kidneys, and bone.


cancer skin guide10 of The Most Common Signs of ALL Canine Cancers:

Here are the most frequently seen signs of canine cancer.

  • Abdominal swelling

  • Bleeding from body openings such as mouth and nose

  • Shortness of  breath

  • Loss of appetite

  • Lumps or bumps on the discoloration of the skin

  • Wounds that won’t heal

  • Diarrhea or Vomiting

  • Sudden weight loss

  • Unexplained swelling, pain, and lameness

  • Visible tumor or mass on the skin

More Articles Relating to Cancer & Tumors

Read more related articles on Cancer & Tumors and how to help your pet! Learn what to look for and get tips on how to prevent.

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