Cancer in Dogs

What I Need to Know About Cancer in Dogs

Cancer is even more prevalent in dogs over the age of 10, at a rate of 50 percent. 1 Certain breeds of dogs are more susceptible to cancer, and size can even factor whether a pet will get cancer. The smaller the dog, the lower the risk of cancer. The rate of cancer in small dogs like Chihuahua or Maltese is less than 10 percent.2

In many cases, environmental stressors like tobacco smoke, pesticides, obesity, and so on cause cancer; however, some breeds can also develop cancer because of their genetic makeup.

According to the Morris Animal Foundation, dog breeds that are at high risk of cancer are:

  • Bernese mountain dog
  • Boxer
  • Chow Chow
  • Cocker spaniel
  • Collie
  • Golden retriever
  • Labrador retriever
  • Pug
  • Rottweiler
  • Scottish terrier
  • Shar-Pei
Types of Cancers in Dogs

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

Head and neck tumors

Brain tumors in dogs

Thyroid tumors in dogs

Extremity tumors in dogs

Spinal tumors in dogs

Pelvic canal tumors in dogs

  • Anal gland adenocarcinomas in dogs
  • Prostatic tumors in dogs

Liver tumors in dogs

Pancreatic tumors in dogs

Lung tumors in dogs

Kidney tumors in dogs

Carcinoma/Epithelial cancer in dogs

Sarcoma/Mesenchymal cancer in dogs

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 http://wearethecure.org/learn-more-about-canince-cancer/canine-cancer-library/