Mouth Growths in Dogs (Benign, Dysplastic, and Malignant Oral Masses)
- Occurrence: rarer
- 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.
The most important facts at a glance
Growths in the mouth of dogs can be benign, dysplastic, or cancerous and can affect structures such as teeth and gums. Benign growths such as fibromas are often localized, while cancerous growths such as melanomas can invade the surrounding tissue. Causes are often genetic predisposition, environmental factors, and chronic Inflammatory conditions. Symptoms can include a mass in the mouth, increased drooling, and unpleasant bad breath. Diagnosis is made through clinical examination, biopsy, and imaging procedures. Treatment varies depending on the type of growth; benign growths are usually removed surgically, while malignant growths may require aggressive treatment, including radiation therapy. Prognosis depends on the type and stage of the growth; benign growths have a better prognosis. Prevention includes regular dental check-ups and avoiding carcinogens. Research focuses on genetic predisposition, new diagnostic methods, and treatment options, including immunotherapies and nanotechnology. These approaches aim to improve the quality of life of affected dogs and develop new prevention strategies. Early detection and treatment are crucial to improve prognosis.
Causes
The oral cavity of dogs is a complex system of teeth, gums, tongue, and surrounding tissues. Each of these structures can be affected by growths. Benign growths such as fibromas or papillomas often develop from connective tissue or the mucous membrane and are generally localized. Dysplastic changes, which can be considered a precursor to cancer, show abnormal cell changes that are not yet invasive. Cancerous growths, such as melanomas or squamous cell carcinomas, invade the surrounding tissue and can metastasize.
The exact cause of these growths is often multifactorial. Genetic predisposition can play a role, as certain breeds, such as Boxers or Cocker Spaniels, are more susceptible to specific growths. Environmental factors, such as smoke exposure or certain chemicals, can also contribute to their development. Chronic Inflammatory conditions or traumas in the oral cavity can increase the risk of developing growths.
Infections, particularly by the papillomavirus, can lead to the development of benign papillomas. These are particularly observed in young dogs and tend to be self-limiting. In contrast, cancerous growths can arise from mutations in cells, leading to uncontrolled growth and invasive behavior. Hormonal influences or immunosuppression can also be risk factors.
Symptoms
The symptoms of growths in the mouth of dogs can vary depending on the type and location of the growth. A common sign is visible Swelling or a lump in the mouth or on the lips. These growths can be smooth or irregular and vary in color from pink to dark brown or black.
Other symptoms include excessive drooling, bad breath, and difficulty chewing or swallowing. Dogs with growths in the mouth may also show signs of Pain, such as Refusal to eat, weight loss, or increased Scratching at the mouth area.
In advanced cases, especially with malignant Tumors, metastasis can occur in other parts of the body, which can lead to symptoms such as Cough, Respiratory distress, or swollen lymph nodes. Bleeding from the mouth or Tooth loss can also occur if the growths attack the tissue or tooth roots.
Therapy
The treatment of growths in the mouth of dogs depends on the type, location, and stage of the growth. For benign growths, surgical removal may be sufficient to achieve complete healing. These procedures are generally minimally invasive and have a good prognosis.
For malignant growths, more aggressive treatment may be required. Surgery remains the primary treatment option to reduce tumor burden and prevent spread. In some cases, a partial maxillectomy or mandibulectomy may be necessary, in which parts of the jaw are removed.
In addition to surgery, radiation therapy and chemotherapy can be used to destroy remaining cancer cells and reduce the risk of recurrence. However, these treatments can have side effects and require careful consideration of the potential benefits and risks.
Prognosis and follow-up care
The prognosis for dogs with growths in the mouth varies greatly and depends on the type and stage of the growth. Benign growths generally have an excellent prognosis, especially if they can be completely removed.
For malignant growths, the prognosis is less favorable, but it can be improved through early diagnosis and aggressive treatment. Melanomas, for example, tend to have an unfavorable prognosis due to their aggressive growth and tendency to metastasize. Squamous cell carcinomas have a better prognosis if they are detected and treated at an early stage.
In cases where complete removal of the growth is not possible or metastases are present, life expectancy may be significantly shortened. The dog’s quality of life plays a key role in decision-making regarding treatment and long-term care.
Prevention
There is no specific prevention against growths in the mouth of dogs; however, some preventive measures can reduce the risk. Regular dental check-ups by a veterinarian can help detect and treat changes in the mouth early.
A balanced diet and a healthy lifestyle can strengthen the immune system and reduce the risk of tumor development. Avoiding exposure to known carcinogens, such as tobacco smoke, can also be helpful.
For dogs that are genetically predisposed, regular monitoring and early interventional measures can reduce the risk of serious complications. It is also important to check your dog’s mouth regularly and see a veterinarian immediately if you notice any irregularities.
Outlook on current research
Current research on growths in the mouth of dogs focuses on a wide range of aspects, including the exact causes, genetic predisposition, and the development of new diagnostic and treatment methods. Non-cancerous, dysplastic, and cancerous growths in the mouth of dogs are a significant area of research because they are common and can significantly impair the animals’ well-being. Researchers are investigating various environmental factors that could contribute to the development of these growths, such as dietary habits and exposure to certain chemicals.
Genetic studies are also an important part of the research. Scientists are trying to identify genetic markers that increase the risk of developing these growths. Such markers could be considered in dog breeding in the future to reduce the risk of oral growths. Researchers are also examining how genetic differences between different dog breeds influence susceptibility to these conditions.
Another research focus is improving diagnostic methods. Traditionally, growths in the mouth are often diagnosed through visual inspection and biopsies, but these methods are not always reliable or fast. Researchers are developing more advanced techniques, such as imaging procedures and molecular diagnostic tests, to enable more accurate and earlier diagnosis.
Regarding treatment, new approaches are being developed to increase the effectiveness and safety of surgical interventions, chemotherapy, and radiation therapy. Some researchers are also investigating the possibility of using immunotherapies that could stimulate the dog’s immune system to fight growths itself. These treatments could be less burdensome for the animals and reduce the risk of side effects.
There are also advances in prevention. Some studies are looking at the development of vaccines that could reduce the risk of certain types of oral growths. In addition, researchers are investigating whether certain dietary supplements or changes in feeding can reduce the risk of growths in the mouth.
In addition to basic research, great emphasis is placed on clinical research to improve the quality of life of dogs with oral growths. New pain management strategies and supportive therapies are being developed to improve the quality of life of affected animals. These studies are crucial to ensure that treatment is not only effective but also animal-friendly.
A promising area of research currently being explored is the use of nanotechnology to treat oral growths. Researchers are developing nanoparticles that can deliver drugs directly into the growths in a targeted way, which could increase treatment effectiveness and minimize side effects. However, this technology is still at an early stage and requires further studies before it can be used clinically.
Overall, research into growths in the mouth of dogs is a dynamic and multidisciplinary field that continuously yields new insights and therapy options. Ongoing studies promise to improve future approaches and further optimize the prognosis for affected dogs.
Frequently Asked Questions (FAQs)
1. What are growths in the mouth in dogs?
2. How can I tell if my dog has growths in the mouth?
3. What causes growths in the mouth in dogs?
4. Are all growths in the mouth in dogs malignant?
5. How are growths in the mouth in dogs diagnosed?
6. Can growths in the mouth in dogs be treated?
7. How can I reduce my dog’s risk of oral growths?
8. Are certain dog breeds more prone to oral growths?
9. Can my dog live a normal life after treatment for oral growths?
10. What should I do if I discover a growth in my dog’s mouth?
Literature
- Gasymova, E. E., Evenhuis, J. V., Goldschmidt, S. L., Arzi, B., & Vapniarsky, N. (2025). A retrospective analysis of oral tumors in dogs in Switzerland identifies peripheral odontogenic fibroma and melanoma as the predominant tumor types. Journal of the American Veterinary Medical Association, 263(1), 45–54. https://doi.org/10.2460/javma.24.06.0414
- Satthathum, C., Srisampane, S., Jariyarangsrirattana, P., Anusorn, P., Sattasathuchana, P., & Thengchaisri, N. (2023). Characteristics of canine oral tumors: Insights into prevalence, types, and lesion distribution. Journal of Advanced Veterinary and Animal Research, 10(3), 554–562. https://doi.org/10.5455/javar.2023.j709
- Blume, G. R., Eloi, R. S. A., Oliveira, L. B., Sonne, L., Rezende, L. P. O., & Sant’Ana, F. J. F. (2023). Lesions of the oral cavity of dogs: 720 cases. Pesquisa Veterinária Brasileira, 43, Article e07073. https://doi.org/10.1590/1678-5150-PVB-7073
- Muñoz-Duque, J. D., Duque-Arias, S., & Correa-Valencia, N. M. (2023). Histopathological results of mouth lesions in dogs and cats from Colombia. Journal of Veterinary Dentistry, 40(2), 164–173. https://doi.org/10.1177/08987564221146896
- Goldschmidt, S. L., Bell, C. M., Waller, K., Hetzel, S., & Soukup, J. W. (2020). Biological behavior of canine acanthomatous ameloblastoma assessed with computed tomography and histopathology: A comparative study. Journal of Veterinary Dentistry, 37(3), 126–132. https://doi.org/10.1177/0898756420969869
- Amory, J. T., Reetz, J. A., Sánchez, M. D., Bradley, C. W., Lewis, J. R., & Reiter, A. M. (2014). Computed tomographic characteristics of odontogenic neoplasms in dogs. Veterinary Radiology & Ultrasound, 55(2), 147–158. https://doi.org/10.1111/vru.12101
- Saffari, P. S., Vapniarsky, N., Pollack, A. S., Gong, X., Vennam, S., Pollack, A. J., Verstraete, F. J. M., West, R. B., Arzi, B., & Pollack, J. R. (2019). Most canine ameloblastomas harbor HRAS mutations, providing a novel large-animal model of RAS-driven cancer. Oncogenesis, 8, Article 11. https://doi.org/10.1038/s41389-019-0119-1