Venereal Tumors (Sexually Transmissible Tumors) in Dogs
- Occurrence: very rare
- Location of illness: Abdomen/pelvis
Venereal tumors in dogs, also known as CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Transmissible Venereal TumorA venereal tumor is a sexually transmitted disease in animals, transmitted through direct Contact during sexual intercourse. In dogs, Sticker's sarcoma is an example of a venereal tumor. (CTVT), are a rare type of cancerCancer refers to the uncontrolled proliferation of cells that can lead to tumors or spread throughout the body. Various types of cancer occur in dogs and cats, ranging from skin cancer to lymphomas. that is primarily transmitted through sexual contact between dogs.
The most important facts at a glance
CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Transmissible Venereal TumorA venereal tumor is a sexually transmitted disease in animals, transmitted through direct Contact during sexual intercourse. In dogs, Sticker's sarcoma is an example of a venereal tumor. (CTVT) is a unique, transmissible tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. in dogs that is mainly transmitted during mating, but also through sniffing or Licking tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. tissue from one dog to another. These tumors do not originate from the cells of the affected dog, but are transferred as “foreign” tissue from an infected dog to another. Scientific studies have shown that the CTVT cells are genetically descended from a dog that lived several thousand years ago. Symptoms include red massesIn pathology, the term "mass" is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). on the penis or vagina, increased Licking in the genital region, and blood droplets. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made by clinical examination and cytological analysis. Treatment options are mainly chemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells. with vincristine, sometimes combined with surgical removal or radiation therapyRadiation therapy is the use of radiation, most often to treat cancer. It can be used to kill cancer cells or slow their growth without significantly damaging surrounding healthy tissue.. The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is generally good, especially with early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment. For preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring., sexual contact between dogs should be controlled, for example by castration or sterilizationSterilization is a medical procedure that permanently removes or interrupts an individual's ability to reproduce. In animals, this often involves the surgical removal of the reproductive organs., and dogs should be kept away from potentially infected animals. Regular veterinary examinations and awareness of the disease also contribute to reducing its spread.
Causes
Canine Transmissible Venereal Tumor (CTVT) is one of the few cancers considered transmissible. These tumors are unique because they do not originate from the cells of the affected dog, but rather through the direct transfer of tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells from an infected dog to another. This occurs mainly during mating, but can also occur through sniffing or Licking of tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. tissue.
CTVT belongs to a very small group of transmissible cancers that occur in animals, including the Tasmanian Devil, which suffers from a similar facial tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions.. In dogs, these tumors represent a form of allotransplantation, where the tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells themselves act as “foreign” tissue that can bypass the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. of the new host.
Scientific studies show that CTVT cells are genetically descended from a single original dog that lived several thousand years ago. This makes CTVT one of the oldest known continuous cell lines in the world. The ability of the tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells to bypass the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. is enabled by genetic and molecular mechanisms that are still the subject of intensive research.
Symptoms
The symptoms of CTVT are often limited to the external reproductive organs but can also occur on other parts of the body if transmission occurs through contact with other mucous membranes. In male dogs, massesIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). often appear on the prepuce, while in female dogs, the vulva may be affected. These tumors appear as cauliflower-like massesIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). that often bleed or ulcerate.
In addition to the visible tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. massesIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer)., affected dogs may also show signs of discomfort, such as lethargy, loss of appetite, and, in severe cases, Weight loss. If the tumors metastasize to the oralOral means “through the mouth” and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. cavity or nasal area, breathing problems or difficulty swallowing may occur.
Diagnosis
The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of CTVT is usually made through a combination of clinical examination and cytological analysis. The veterinarian will perform a biopsyA biopsy is a medical procedure in which a small amount of tissue is removed from the body to be examined under a microscope for signs of disease. Biopsies can help diagnose cancer and other conditions. or fine needle aspiration of the suspicious massIn pathology, the term "mass" is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). to collect cells for microscopic examination.
The cytological examination typically shows large, round tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells with a characteristic appearance. These cells have a high nucleus-to-cytoplasm ratio, multipleMultiple means manifold or repeated and is used to describe conditions or events that occur in multiple instances or at different locations. In veterinary medicine, this may indicate multiple lesions, tumors, or other pathological changes. nucleoli, and a moderate amount of bluish cytoplasmCytoplasm is the part of the cell that lies outside the nucleus and where most cellular activities take place. It contains organelles and the cytoskeleton.. A definitive diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is supported by these microscopic features.
Therapy
The treatment of CTVT is usually very effective, with chemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells. being the preferred method. Vincristine is the most common chemotherapeutic agent, administered weekly over several weeks. This treatment leads to complete remission in most cases.
In some cases, surgical removal of the tumors may also be considered, especially if the tumors are small and easily accessible. However, surgical removal alone has a higher risk of recurrence, which is why it is often combined with chemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells..
Radiation therapyRadiation therapy is the use of radiation, most often to treat cancer. It can be used to kill cancer cells or slow their growth without significantly damaging surrounding healthy tissue. is another treatment option that can be used in cases where chemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells. is contraindicated or tumors cannot be surgically removed. However, this method is less common and is usually offered in specialized veterinary oncologyOncology is the branch of medicine that deals with the diagnosis, treatment, and research of cancer. In veterinary medicine, this includes the treatment of cancers in animals. centers.
Prognosis and follow-up care
The prognosis for dogs with CTVT is generally very good, especially if the disease is detected and treated early. The majority of dogs respond well to chemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells. and achieve complete remission. The recurrence rate is low if the therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. is performed correctly.
In cases where the tumors are not treated in time or if they metastasize, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. may be worse. However, metastasesA metastasis is a secondary tumor that originates from a primary, malignant tumor in another part of the body. Metastases indicate that cancer has spread in the body. are relatively rare in CTVT and usually occur in the regional lymph nodes or in the skin.
Prevention
The most effective method for preventing CTVT is to control the reproductive behavior of dogs. This can be achieved through castration or sterilizationSterilization is a medical procedure that permanently removes or interrupts an individual's ability to reproduce. In animals, this often involves the surgical removal of the reproductive organs. to minimize sexual contact, which is the main mode of transmission of the tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells.
In addition, dog owners should be careful to keep their animals away from unknown or stray dogs that may be infected. Regular veterinary examinations and awareness of the symptoms of CTVT can also help prevent the spread of the disease.
Another important aspect of preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. is educating dog owners about the risks and transmission routes of CTVT. An informed community can help reduce the spread of these tumors in the dog population.