Tongue Cancer in Dogs (Lingual Squamous Cell Carcinoma)
- Occurrence: common
- Location of disease: Head/Neck
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Lingual squamous cell carcinoma in dogs is a malignant tumor that arises from the squamous epithelial cells of the tongue. These cells form the outermost layer of the skin and mucous membranes in the body. The tumor is aggressive and can grow rapidly, leading to significant health problems.
The most important facts at a glance
Lingual squamous cell carcinoma is a malignant tumor that occurs in dogs and arises from cells of the outer layer of the skin as well as the mucous membranes. It is one of the most common forms of oral cavity tumors in dogs. The causes are unclear, but genetic factors, certain dog breeds such as Golden Retrievers and Boxers, environmental factors such as UV radiation, as well as chemical exposure and viral infections can increase the risk. Symptoms include increased salivation, white coatings on the tongue, difficulty eating, and Pain. Diagnosis includes a thorough examination of the oral cavity and a biopsy to confirm the tumor. Imaging procedures such as X-ray or CT scans help assess spread. Treatment depends on the size and location of the tumor and often includes surgery, radiation therapy, and chemotherapy. The prognosis varies depending on stage and treatment; early detection is crucial for a better prognosis. Preventive measures include minimizing risk factors such as tobacco smoke and chemicals, as well as regular veterinary check-ups. Research focuses on genetic factors, new diagnostic methods, and improved therapies, including immunotherapies and targeted therapies. Holistic care could lead to better prognoses and a higher quality of life in the future.
Causes
Squamous cell carcinomas belong to a group of tumors classified as malignant because they have the potential to invade surrounding tissue and spread to other parts of the body. These tumor cells originate from squamous epithelial cells, which normally cover the outer layer of the skin as well as mucosal surfaces.
In dogs, squamous cell carcinomas are among the most common Tumors of the oral cavity. The exact causes are not fully understood, but there are several factors that could increase the risk. These include genetic predispositions, environmental factors such as excessive sun exposure, exposure to certain chemicals, and viral infections.
Genetic factors play a significant role in the development of squamous cell carcinomas. Certain breeds, such as Golden Retrievers and Boxers, appear to be more susceptible to developing these Tumors. This genetic predisposition could be due to inheritance patterns that affect cell regulation and cancer development.
Environmental factors such as UV radiation are known to cause squamous cell carcinomas in exposed areas of the body. Although this primarily plays a role in skin cancer, a similar mechanism could be involved in the development of Tumors in the oral cavity, albeit to a lesser extent. Chemicals found in tobacco smoke or certain pesticides could also increase the risk.
Infections with certain viruses, such as papillomavirus, have also been linked to the development of squamous cell carcinomas. These viruses can cause genetic changes in cells that ultimately lead to tumor formation.
Symptoms
Symptoms of lingual squamous cell carcinoma in dogs can vary depending on the size and location of the tumor. One of the most common symptoms is a visible or palpable mass on the tongue. This mass may initially be small and inconspicuous, but over time it can grow larger and ulcerate.
Dogs with tongue cancer often have difficulty eating and swallowing. The tumor can cause Pain, leading to reduced food intake and Weight loss. In some cases, increased salivation may also occur, often with traces of blood.
Other possible symptoms include bad breath and changes in the dog’s behavior, such as Irritability or withdrawal. The dog may also show signs of general malaise or lethargy. It is important to note that these symptoms can also occur with other conditions, which is why an accurate diagnosis is required.
Therapy
Treatment of lingual squamous cell carcinomas in dogs depends on various factors, including the size and location of the tumor and the dog’s general condition. A common treatment method is surgical removal of the tumor. The goal is to remove the tumor completely to prevent it from spreading.
In some cases, radiation therapy may be considered, especially if the tumor cannot be completely removed surgically or is located in a hard-to-reach area. Radiation therapy can help reduce tumor mass and slow tumor growth.
Chemotherapy can also be used as an additional treatment, especially in advanced cases or when metastasis is present. The choice of treatment depends on the dog’s individual situation, and the veterinarian will recommend the best approach based on a comprehensive assessment.
Prognosis and follow-up care
The prognosis for dogs with squamous cell carcinoma of the tongue varies greatly and depends on several factors, including the tumor stage at the time of diagnosis and the chosen treatment methods. With early detection and complete surgical removal of the tumor, the prognosis is generally better.
Unfortunately, the prognosis is generally worse in advanced disease or when metastasis is present. However, the course of the disease can be improved with appropriate treatment and care, which can significantly enhance the dog’s quality of life.
An important aspect of prognosis is regular follow-up care to detect and treat tumor recurrence early. The veterinarian will recommend regular check-ups to monitor the dog’s health status and intervene in a timely manner.
Prevention
While there is no guaranteed way to completely prevent lingual squamous cell carcinomas in dogs, certain measures can reduce the risk. An important step is minimizing exposure to known risk factors such as tobacco smoke and harmful chemicals.
A balanced diet and healthy lifestyle can strengthen the immune system and potentially reduce the risk of tumor formation. Regular dental check-ups and good oral hygiene are also important to maintain overall oral cavity health.
Early detection and treatment of anomalies in the oral cavity are crucial. Regular veterinary check-ups and careful observation of changes in the dog’s behavior or appearance can help identify and treat problems early.
Outlook on current research
Current research on lingual squamous cell carcinoma in dogs focuses on various aspects to improve the diagnosis, treatment, and prevention of this disease. Scientists are investigating genetic factors that could increase the risk of developing tongue cancer in dogs. By analyzing DNA samples and comparing the genetic profiles of affected and healthy dogs, researchers are trying to identify specific genetic markers associated with an increased risk.
Another important area of research is the development of new diagnostic methods. Current diagnostic procedures often rely on clinical examinations and biopsies, which can be invasive. Researchers are working on non-invasive techniques such as analyzing saliva samples to detect early signs of cancer. These methods could make diagnosis easier and improve dogs’ well-being because they are less stressful.
In addition, intensive research is being conducted on improving treatment options. Surgical procedures, radiation therapy, and chemotherapy are used as standard treatments. Scientists are investigating new drugs and their combinations to increase effectiveness and reduce side effects. Immunotherapies that stimulate the dog’s immune system to specifically fight cancer cells are also a promising approach.
Another innovative approach is the use of targeted therapies that attack specific molecules on cancer cells without damaging healthy tissue. These therapies are based on a deep understanding of the molecular mechanisms that promote the growth of cancer cells. By identifying targets in cancer cells and developing drugs that block these targets, future treatments could become more effective and gentler.
Finally, the role of diet and lifestyle in the prevention and treatment of tongue cancer is being studied. Studies show that certain dietary habits and environmental factors can influence the risk of developing cancer. Research is focusing on identifying foods or dietary supplements with protective properties, as well as reducing carcinogenic exposures in dogs’ everyday lives.
Combining these research approaches could lead to more holistic and personalized care for dogs with lingual squamous cell carcinoma in the future, ultimately contributing to better prognoses and a higher quality of life for affected animals.
Frequently Asked Questions (FAQs)
1. What is lingual squamous cell carcinoma in dogs?
2. What symptoms do dogs with tongue cancer show?
3. How is tongue cancer diagnosed in dogs?
4. What treatment options are available for tongue cancer in dogs?
5. What is the prognosis for dogs with tongue cancer?
6. Are certain breeds more likely to develop tongue cancer?
7. Are there ways to reduce the risk of tongue cancer in dogs?
8. How can I help my dog recover from cancer treatment?
9. Is tongue cancer in dogs contagious?
10. Are new treatment methods being developed for tongue cancer in dogs?
Literature
- Culp, W. T. N., Ehrhart, N., Withrow, S. J., Rebhun, R. B., Boston, S., Buracco, P., Reiter, A. M., Schallberger, S. P., Aldridge, C. F., Kent, M. S., Mayhew, P. D., & Brown, D. C. (2013). Results of surgical excision and evaluation of factors associated with survival time in dogs with lingual neoplasia: 97 cases (1995–2008). Journal of the American Veterinary Medical Association, 242(10), 1392–1397. https://doi.org/10.2460/javma.242.10.1392
- Dennis, M. M., Ehrhart, N., Duncan, C. G., Barnes, A. B., & Ehrhart, E. J. (2006). Frequency of and risk factors associated with lingual lesions in dogs: 1,196 cases (1995–2004). Journal of the American Veterinary Medical Association, 228(10), 1533–1537. https://doi.org/10.2460/javma.228.10.1533
- Riker, J., & Rissi, D. R. (2025). A retrospective study of lingual lesions in 793 dogs and 406 cats at the Athens Veterinary Diagnostic Laboratory, 2010–2020. Journal of Veterinary Diagnostic Investigation, 37(1), 176–183. https://doi.org/10.1177/10406387241278888
- Schmidt, B. R., Glickman, N. W., DeNicola, D. B., de Gortari, A. E., & Knapp, D. W. (2001). Evaluation of piroxicam for the treatment of oral squamous cell carcinoma in dogs. Journal of the American Veterinary Medical Association, 218(11), 1783–1786. https://doi.org/10.2460/javma.2001.218.1783
- Boss, M.-K., Harrison, L. G., Gold, A., Karam, S. D., & Regan, D. P. (2023). Canine oral squamous cell carcinoma as a spontaneous, translational model for radiation and immunology research. Frontiers in Oncology, 12, 1033704. https://doi.org/10.3389/fonc.2022.1033704
- Katt, W. P., Balkman, C. E., Butler, S. D., Byron, M., Carney, P. C., Todd-Donato, A. B., Drozd, M. E., Duhamel, G. E., Evans, J. M., Fiani, N., Ford, J. C., Grenier, J. K., Hayward, J. J., Heikinheimo, K., Hume, K. R., Moore, E. S., Puri, R., Sylvester, S. R., Warshaw, S. L., … Peralta, S. (2025). The MEK inhibitor trametinib is effective in inhibiting the growth of canine oral squamous cell carcinoma. Scientific Reports, 15, 7069. https://doi.org/10.1038/s41598-025-90574-3