Cancer is one of the most common health concerns affecting dogs, and for many pet owners, it can feel like a diagnosis that comes without warning. In reality, cancer often develops quietly, without obvious signs in the early stages. By the time symptoms appear, the disease may already be advanced.
This is why dog cancer screening is becoming an important part of modern veterinary care. Detecting cancer earlier can make a meaningful difference in treatment options, outcomes, and your dog’s quality of life.
At Adobe Veterinary Center, we focus on providing clear answers and advanced diagnostics so you can make informed decisions about your pet’s health, whether your dog is showing signs of illness or simply getting older.
How Common Is Cancer in Dogs?
Cancer is unfortunately very common in dogs. According to the American Veterinary Medical Association (AVMA), approximately 1 in 4 dogs will develop cancer during their lifetime, and that risk increases to 1 in 2 for dogs over the age of 10.
- The average age of diagnosis is around 8.8 years
- About two-thirds of dogs diagnosed with cancer are over age 7
While cancer can occur at any age, the risk increases significantly as dogs get older. Certain breeds are also more predisposed, including Golden Retrievers, Boxers, Labrador Retrievers, German Shepherds, Rottweilers, and Greyhounds. Greyhounds are at an exceptionally high risk for osteosarcoma (bone cancer), with studies indicating they are up to 17 times more likely to develop it than crossbreed dogs. Royal Veterinary College
Because of these risks, dog cancer screening becomes especially valuable as part of routine care for senior dogs and higher-risk breeds.
Why Early Detection Matters
One of the most important reasons to consider dog cancer screening is that early detection can significantly improve outcomes.
When cancer is diagnosed at a later stage, it is often more advanced and harder to treat. Studies show that:
- Larger or more advanced tumors are linked to shorter survival times
- Dogs showing clinical signs at diagnosis tend to have poorer outcomes and higher relapse rates
The Veterinary Cancer Society also notes that cancer is one of the leading causes of death in older dogs, reinforcing the importance of early detection.
At Adobe Veterinary Center, early detection is a key part of how we approach care. Identifying potential concerns sooner allows us to guide you through next steps with greater clarity and more options.
Common Types of Cancer in Dogs
Cancer in dogs is not a single disease. It can affect different parts of the body and develop in very different ways, which is one of the reasons it can be difficult to recognize early.
Some of the most common cancers veterinarians diagnose include:
- Lymphoma
- Osteosarcoma – an aggressive bone cancer, often seen in larger breeds
- Mast cell tumors – the most common skin tumors in dogs
- Oral melanoma – can develop in the mouth, skin, or nail beds
- Hemangiosarcoma – a fast-growing cancer that affects blood vessels, often involving the spleen or heart
- Transitional cell carcinoma – a cancer of the urinary system, typically affecting the bladder
Each of these cancers behaves differently. Some may cause visible changes, while others can progress quietly, making it difficult to interpret changes in your dog’s health at home.
Because of this wide range of presentation, changes in your dog’s health are not always easy to interpret at home. This is where veterinary evaluation and appropriate diagnostic testing play an important role in identifying concerns early.
Understanding Lymphoma in Dogs
Among the many types of cancer seen in dogs, lymphoma is one of the most common and one of the few that can be evaluated through specific screening tests.
This cancer affects lymphocytes, a type of white blood cell that plays an important role in the immune system.
Lymphoma most often develops in the lymph nodes but can also affect other areas of the body. Because it can progress without obvious early symptoms, it is not always detected during routine observation at home.
For this reason, dog cancer screening can be especially helpful. Testing may identify changes earlier, even when your dog appears healthy, allowing for earlier evaluation and more informed decision-making.
Where Are Lymph Nodes Located in Dogs?
Because lymphoma often involves lymph nodes, understanding where these structures are located can help explain what veterinarians are evaluating during an exam.
Lymph nodes are part of your dog’s immune system and are located throughout the body. In cases of lymphoma, these nodes may become enlarged because they contain the white blood cells affected by the disease.
During a veterinary exam, commonly evaluated lymph nodes include:
- Under the jaw
- In front of the shoulders
- Behind the knees
- In the groin area
Changes in these lymph nodes are not always obvious and can be caused by a variety of conditions, including infection, inflammation, or cancer. Because of this, it is not always possible to determine the cause based on appearance or touch alone.
This is where dog cancer screening becomes especially important. At Adobe Veterinary Center, we use a combination of physical examination and advanced diagnostics to better understand what is happening and determine the most appropriate next steps for your pet.
What Is Dog Cancer Screening and How Does It Work?
Modern dog cancer screening includes advanced diagnostic tools that help detect signs of cancer earlier than traditional methods alone.
One example is IDEXX Cancer Dx testing, which is designed to evaluate lymphoma using specialized biological markers. A small blood sample is collected during your dog’s visit and then sent to IDEXX Reference Laboratory, where board-certified specialists use advanced equipment to analyze the results.
This approach allows Adobe Veterinary Center to provide accurate, timely information while working with a highly trusted laboratory partner.
How It Works
- A small blood sample is collected during your dog’s exam
- The sample is sent to IDEXX Reference Laboratory for analysis
- Advanced testing evaluates cancer-related markers
- Results are typically available within a few days
How Reliable Is Dog Cancer Screening?
This type of dog cancer screening is designed to be highly reliable:
- It identifies most dogs who have cancer
- If a result suggests cancer, it is very likely to be accurate
No screening test is perfect, which is why results are always interpreted alongside your dog’s exam and medical history. If needed, additional testing may be recommended to confirm a diagnosis.
Which Dogs Should Have Cancer Screening?
Dog cancer screening is not necessary for every dog at every stage of life, but it can be especially helpful in certain situations:
- Dogs aged 7 years and older
- High-risk breeds starting at age 4
- Dogs with unexplained symptoms such as lethargy, appetite changes, or swollen lymph nodes
Screening can also be included as part of routine wellness care, helping us monitor changes over time and respond early if something develops.
What Do Screening Results Mean?
If results suggest cancer:
- Indicates the presence of cancer-associated markers
- Additional diagnostics such as imaging or biopsy may be recommended
- Helps guide next steps, including referral to a specialist when appropriate
If results do not suggest cancer:
- Cancer is less likely, but not completely ruled out
- Further evaluation may still be recommended depending on your dog’s condition
At Adobe Veterinary Center, results are always interpreted alongside your dog’s full clinical picture so we can provide thoughtful, individualized recommendations.
Advanced Diagnostics Without the Stress of Travel
When the answers are not obvious, having access to advanced diagnostics without needing to travel to a specialty hospital can make a meaningful difference.
At Adobe Veterinary Center, we begin with a thorough exam and, when appropriate, collect samples in the clinic for further testing. For more complex diagnostics, we partner with IDEXX Reference Laboratory, where board-certified specialists analyze the results using advanced technology.
This approach allows us to provide accurate information and clear guidance on next steps, while keeping your pet’s care as convenient and stress-free as possible.
Early Detection Can Make All the Difference
Cancer is a serious diagnosis, but early detection can open the door to more options and better outcomes.
By incorporating dog cancer screening into your pet’s routine care, you are taking an important step toward protecting their long-term health.
If something about your dog’s health does not feel quite right, or if your pet is entering their senior years, Adobe Veterinary Center is here to help. Our team can evaluate your dog, discuss whether dog cancer screening is appropriate, and provide the answers you need.
Contact Adobe Veterinary Center to schedule an exam and learn whether dog cancer screening is right for your pet.