Cancer in Dogs

What I Need to Know About Cancer in Dogs

Man having fun and playing with his dog

Your dog isn’t just “man’s best friend.” Your dog is a member of your family. When a dog is diagnosed with cancer, it is devastating. Did you know that more than 6 million dogs are diagnosed with cancer every year?

Canine cancer is even more prevalent in dogs over the age of 10, at a rate of 50 percent.1 While any dog can get any type of cancer, environmental stressors such as tobacco smoke, pesticides, and obesity can also increase the risk of cancer and tumors in dogs.

Would you know if your dog was suffering from cancer? Many dog owners don’t and we want to help.

Symptoms of Cancer in Dogs

Be observant to any changes in your dog’s physical appearance and behavior. Not all cancer warning signs are apparent right away, with some changes developing over time. Much like in people, early detection can significantly increase the likelihood of a good outcome.

If you notice any of these symptoms of cancer in your dog, contact your veterinarian to check things out. In the event that cancer is diagnosed, know that a wide variety of cancer treatments are available. Even if the cancer is not curable, there is almost always something that can be done to improve your dog’s quality of life.

  • Enlarged or changing lumps and bumps
  • Sores that do not heal
  • Chronic weight loss or weight gain
  • Change in appetite
  • A persistent cough
  • Persistent lameness or stiffness
  • Unpleasant odor from the mouth
  • Difficulty breathing, eating or swallowing
  • Difficulty urinating or defecating
  • Bleeding or discharge from any opening

Regular wellness exams will provide your veterinarian the opportunity to check for signs of cancer, but you can take a more proactive approach to your dog’s health by looking for these warning signs regularly. When in doubt, get it checked out.

What to Do If Your Dog Has Cancer

If your dog has been diagnosed with cancer, get in touch with one of our Pet Advocates at (833) PET-HERO or your local PetCure Oncology center. Our experienced, compassionate team is here to help and answer your questions.

SEE ALSO: Tips for Caring for a Dog with Cancer, When to Euthanize A Dog With Cancer

  1. National Cancer Institute Center for Cancer Research. Accessed July 23, 2018, from https://ccr.cancer.gov/Comparative-Oncology-Program/pet-owners/disease-info
Types of Cancers in Dogs

If your dog is displaying any symptoms of cancer or has been diagnosed with cancer, sort below by cancer type or tumor location to learn more about the most common types of cancer in dogs and available treatment options. Click on the links for more specific information on treatment and real patient stories.


Carcinoma/Epithelial cancer in dogs

Sarcoma/Mesenchymal cancer in dogs

  • Fibrosarcoma
  • Chondrosarcoma
  • Osteosarcoma
  • Hemangiopericytoma
  • Histiocytic sarcoma
  • Peripheral nerve sheath tumor/Schwannoma
  • Meningioma
  • Astrocytoma
  • Glioma
  • Oligodendroglioma
  • Choroid Plexus papilloma
  • Ependymoma
  • Multilobular osteochondroma

Round Cell cancer in dogs


  1. National Cancer Institute Center for Cancer Research. Accessed July 23, 2018, from https://ccr.cancer.gov/Comparative-Oncology-Program/pet-owners/disease-info 
  2. National Canine Cancer Foundation. Accessed July 23, 2018, from https://wearethecure.org/learn-more-about-canine-cancer/canine-cancer-library/

More than 6,000 pet families have chosen PetCure Oncology for their dog or cat's cancer therapy. We give your pet a fighting chance to improve their quality of life. We understand. We commit. We will help.