Canine Lymphoma Awareness: What Every Dog Owner Should Know This November 7

November 7 marks National Canine Lymphoma Awareness Day — a day to shine a light on one of the most common and serious cancers in dogs: canine lymphoma. Originated by dog trainer Terry Simons, who lost his beloved dog, Reveille, to this disease, this national day reminds us of the vital importance of early detection and informed care for our four-legged family members.

At Billings Animal Family Hospital, we know that your dog is family. That’s why we’re committed to empowering pet owners in Billings, Montana, with clear, compassionate information about canine lymphoma. If you’ve ever wondered about the symptoms, causes, and treatment options, this blog is for you.

What is canine lymphoma?

Canine lymphoma (also known as lymphoma in dogs) is a type of cancer that affects the lymphatic system, which plays a crucial role in the immune system. This cancer primarily impacts the white blood cells called lymphocytes, which are responsible for fighting off infections.

There are more than 30 types of lymphoma in dogs, but the four most common include:

• Multicentric lymphoma – affects lymph nodes throughout the body

• Alimentary lymphoma – affects the gastrointestinal tract

• Mediastinal lymphoma – impacts the chest area

• Extranodal lymphoma – appears in organs like the skin, eyes, or bone marrow

What causes canine lymphoma?

While no one knows exactly what causes canine lymphoma, several risk factors have been identified:

• Breed predispositions: Certain breeds, such as Golden Retrievers, Boxers, and German Shepherds, are more prone to lymphoma.

• Environmental triggers: Exposure to certain chemicals, herbicides, and secondhand smoke may increase risk.

• Immune system suppression: Dogs with compromised immunity may be more vulnerable.

Just like in humans, cancer in dogs can have multiple causes, and sometimes, it develops with no clear reason at all.

Symptoms of canine lymphoma to watch for

Recognizing the symptoms of canine lymphoma early can significantly improve outcomes. Some of the most common signs include:

• Swollen lymph nodes (under the jaw, behind the knees, in the armpits)

• Loss of appetite or weight loss

• Lethargy or weakness

• Vomiting or diarrhea (especially with alimentary lymphoma)

• Difficulty breathing (if lymphoma affects the chest)

• Increased thirst or urination

If your dog shows any of these symptoms, don’t wait. Book a pet wellness exam with a trusted vet in Billings, MT, right away.

How is canine lymphoma diagnosed?

Diagnosing lymphoma in dogs begins with a thorough physical examination and routine blood tests. One of the first signs a veterinarian may notice is enlarged lymph nodes, which can often be felt under the jaw, in the armpits, or behind the knees.

Additional diagnostics, such as X-rays or ultrasounds, help assess whether internal organs like the spleen or liver are affected. These imaging tools can also help determine how far the cancer has progressed and if it has spread to other parts of the body.

Because lymphoma is one of the most common forms of canine cancer, early detection is crucial. Your vet may perform a fine needle aspirate or lymph node biopsy to confirm the presence of abnormal lymphocytes, the white blood cells involved in this disease.

Providing canine lymphoma education to dog owners empowers them to act quickly, giving their pet the best chance at successful treatment and quality of life.

Worried about unusual symptoms in your dog?

Learn how to spot early warning signs with this quick guide: How To Diagnose Pet Symptoms Early.

Canine lymphoma treatment: What are your options?

Thankfully, treatment for canine lymphoma has advanced significantly in recent years. The most common treatments include:

1. Chemotherapy

This is the frontline treatment for most types of canine lymphoma. Dogs often tolerate chemotherapy better than humans, with fewer side effects.

2. Radiation therapy

This may be used for localized lymphomas or when surgery is not possible.

3. Steroids or supportive medications

Prednisone is often prescribed to reduce inflammation and make your dog more comfortable.

Every dog’s journey is different. Some respond well to chemotherapy, while others may benefit more from palliative care. The goal is always to extend quality of life.

Learn more about our oncology and specialized treatment services here.

How you can help raise canine lymphoma awareness

Canine lymphoma awareness isn’t just about knowing what to look for — it’s about becoming an advocate for your pet’s health. This National Canine Lymphoma Awareness Day, consider doing the following:

• Schedule a wellness check-up with your veterinarian

• Share this blog to raise awareness among fellow dog owners

• Download our Emergency Vet Contact Card; it could save your pet’s life

Frequently asked questions

1. Can canine lymphoma be cured?

While there is no cure, many dogs go into remission with proper canine lymphoma treatment, especially if diagnosed early.

2. How long can a dog live with lymphoma?

With chemotherapy, many dogs live 6–12 months or longer in remission. Without treatment, survival is usually 1–2 months.

3. Are some breeds more at risk?

Yes. Golden Retrievers, Boxers, and Rottweilers are among the breeds more commonly diagnosed.

4. Is canine lymphoma painful?

In the early stages, it may not be painful. However, as the cancer progresses, discomfort can increase, which is why prompt care matters.

5. How is canine lymphoma different from other cancers in dogs?

Lymphoma is one of the most common cancers in dogs and affects the lymphatic system, allowing it to spread faster than many localized tumors. It often involves the lymph nodes, white blood cells, and organs like the spleen.

Your trusted veterinary partner in Billings, Montana

Canine lymphoma is a serious but manageable condition when caught early. In this blog, we explored the most important aspects of the disease, including what causes canine lymphoma and canine lymphoma symptoms. Understanding these signs can help you make informed decisions about your dog’s health.

If you notice any unusual changes in your dog’s behavior or physical condition, it’s important to consult your veterinarian promptly. A thorough pet wellness exam and diagnosis can lead to better outcomes and improved quality of life for your pet.

Contact Billings Animal Family Hospital via our online form or call us at (406) 245-4772.