Skin tumors are among the most common skin diseases in dogs. Skin tumors that occur in the skin itself (in the epidermis or the dermis) are called subcutaneous tumors and develop just under the skin.
Strictly speaking, a tumor is a prominent, hard, and well-defined lesion. On the other hand, a neoplasm is tissue overgrowth, which does not match the growth of other body tissues. However, in practice, both terms are used interchangeably.
In this AnimalWised article, we will explain the different types of skin tumors on dogs that exist, what the symptoms are, and the most common treatments. Keep reading:
Types of skin tumours on dogs
Malignant skin tumors grow quickly and can spread to other parts of the body (a process known as metastasis), damaging other organs and even threatening the life of the dog. Instead, benign tumors can cause some discomfort but usually do not cause serious damage.
There are many forms of tumors and skin tumors in dogs, but some of the most common are:
- Perianal adenoma
- Haemangioma
- Haemangiosarcoma
- Lymphoma
- Lipoma
- Melanoma
- Papilloma
- Basal cell tumour
- Apocrine gland tumour of the anal sac
- Canine transmissible venereal tumour
It should be noted that certain breeds may be predisposed to specific types of tumors. For example, Boxers are often more susceptible to mast cell tumors, while Golden Retrievers may be at risk for hemangiosarcoma. Understanding these breed-specific risks can help in the early detection and treatment of potential issues.
Causes and risk factors
The causes are varied. Skin tumors can be induced by infections, cancer, or simply by the accumulation and compaction of fat masses under the skin.
Environmental factors may play a role in tumor development, but genetic factors also play a fundamental role. Many dog breeds are prone to develop skin tumors and skin malignancies. These breeds include:
- Basset hound
- Boxer
- Bullmastiff
- Norwegian elkhound
- Golden retriever
- Kerry blue terrier
- Scottish terrier
- Weimaraner
In addition, age and hormonal imbalances are also significant risk factors. Older dogs are more likely to develop tumors due to changes in cellular regulation as they age. Similarly, dogs that are not spayed or neutered may experience hormonal fluctuations that can influence tumor growth.
Symptoms
The symptoms vary depending on the type of tumor, but in general, they will cause prominent masses of tissue such as protruding lumps you can feel by touching the dog or noticeable to the naked eye. Common symptoms of skin tumors include:
- Nodules, whether rounded or cauliflower-shaped.
- Pedunculated masses pushing on the skin (i.e., they have a stem).
- Lumps covered with scaly skin, or on bare skin.
- Bleeding or ulcerated nodules or bumps.
In addition to the physical manifestations, some dogs may exhibit behavioral changes such as increased irritability or lethargy due to discomfort or pain caused by the tumors. If any of these symptoms are observed, it is critical to seek veterinary advice promptly.
Diagnosis
The diagnosis is established through cytology and histopathology tests on a sample of the tumor.
The sample can be taken through a fine-needle aspiration (using a syringe) through a slide (only in some tumors) or through a biopsy.
Although the veterinarian may be very experienced, it is necessary to perform laboratory studies to confirm or rule out the presence of a tumor or neoplasm and to know for certain if it is a malignant or benign formation.
Only the veterinarian is trained to properly diagnose a tumor.
Additionally, imaging techniques such as X-rays or ultrasounds may be employed to assess the extent of the tumor and its potential spread to other organs. These diagnostic tools are invaluable in crafting an effective treatment plan and determining the prognosis.
Treatment
Treatment will depend on each individual case and will be carried out according to the particular type of tumor and conditions of the sick dog.
- Benign tumors usually do not need to be treated because they do not cause any major problems. We only proceed to remove it with surgery if there are risks or it is causing the dog discomfort.
- Malignant tumors are usually removed by surgery, but radiation therapy, cryotherapy, and chemotherapy may be used in some cases as alternatives to surgery and as complementary treatments in others.
The prognosis is variable but most skin tumors in dogs can be cured if treated early. Logically, malignant tumors in advanced stages have a poorer outcome, but when caught early can be treated effectively.
In some cases, immunotherapy may also be explored as a treatment option, aiming to boost the dog's immune system to fight cancer cells more effectively. This innovative approach has shown promise in certain circumstances, providing hope for improved outcomes.
Prevention
There is no way to completely prevent skin tumors in dogs. However, it is advisable not to expose dogs with mostly white fur and hairless dogs to sunlight for a long time, especially around noon.
Good nutrition and proper exercise will certainly help to give them a healthier body, a very important factor but not one that will definitely prevent it. Going to the vet regularly will help us detect the appearance of a tumor as soon as possible. Thanks to early detection we can get a better diagnosis and better treatment. Do not forget it!
Furthermore, maintaining a regular grooming routine can help in the early detection of any unusual lumps or changes in the dog's skin condition. Regular check-ups with the vet, coupled with a balanced diet enriched with antioxidants, might reduce the risk of tumor development by supporting overall cellular health.
This article is purely informative. AnimalWised does not have the authority to prescribe any veterinary treatment or create a diagnosis. We invite you to take your pet to the veterinarian if they are suffering from any condition or pain.
If you want to read similar articles to Skin Tumors on Dogs, we recommend you visit our Other health problems category.