Hemangiopericytoma (cancer of the blood vessel cells) in Dogs
- Occurrence: rarer
- Location of disease: General/Whole body, Legs
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
A hemangiopericytoma is a rare, usually benignBenign refers to a non-invasive, non-serious condition that is not life-threatening. In medicine, the term is often used to describe benign tumors that do not metastasize, meaning they do not form secondary tumors. type 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. that originates from pericytesPericytes are cells closely associated with blood capillaries and small blood vessels. They play a role in the blood-brain barrier, angiogenesis, and wound healing. Pericytes help maintain vascular stability and function in dogs and cats., the cells that surround blood vessels. These tumors often occur in the skin or subcutaneousSubcutaneous means "under the skin." In medicine, it refers to the administration of drugs or the placement of implants directly under the skin. tissue of dogs.
The most important facts at a glance
Hemangiopericytomas are tumors in dogs that arise from pericytesPericytes are cells closely associated with blood capillaries and small blood vessels. They play a role in the blood-brain barrier, angiogenesis, and wound healing. Pericytes help maintain vascular stability and function in dogs and cats., cells that surround small blood vessels. The exact causes are unclear, but genetic factors could play a role, as some dog breeds are more susceptible. Environmental factors such as chemicals could also contribute, but there is no conclusive evidence. Symptoms include slow or fast-growing 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)., usually on the legs, which can be hairless and pigmented. 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 through physical examination and tissue samples such as biopsies. Additional tests such as X-rays or ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. can determine the extent of the disease. The main treatment is the surgical removal 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., often with a safety margin of healthy tissue. In the case of incomplete removal or metastasisA 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., radiation or 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. may be considered. Aftercare is crucial to avoid complications and detect recurrence. 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 usually good if 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. is completely removed, but monitoring remains important. PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. measures are not specific, but regular veterinary check-ups help with early detection. Research focuses on genetic and diagnostic aspects as well as new therapies to improve 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.
Causes
Hemangiopericytomas are tumors that develop from pericytesPericytes are cells closely associated with blood capillaries and small blood vessels. They play a role in the blood-brain barrier, angiogenesis, and wound healing. Pericytes help maintain vascular stability and function in dogs and cats., a type of cell that surrounds capillariesCapillaries are the smallest blood vessels in the body, connecting arteries and veins. They facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste products between blood and tissues. and small blood vessels. These cells play a role in regulating blood flow and vessel stability. If the growth of these cells becomes uncontrolled, it can lead to the formation of a 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..
Although the exact causes of hemangiopericytomas are not fully understood, it is believed that genetic factors could play a role. Some dog breeds seem to have an increased predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. for this type 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., which points to a genetic component.
Environmental factors, such as exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats. to certain chemicals or radiation, could also contribute to the development of hemangiopericytomas. However, there is no conclusive evidence yet to confirm this connection.
Symptoms
Hemangiopericytomas often manifest as slow-growing, firm lumps under the skin. They can occur in various sizes and are often not painful. The skin over 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. may feel normal or be reddened, depending on the size and location 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..
In some cases, the tumors can form ulcers or bleed, especially if they are located in areas frequently exposed to friction or pressure. This can lead to secondary infections.
Since hemangiopericytomas affect the blood vessels, large tumors can cause circulatory disorders in the affected area, which can lead to swelling or other changes.
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 a hemangiopericytoma usually begins with a thorough physical examination of the dog. The veterinarian will assess the size, shape, and consistency 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. and look for other signs of illness.
A fine-needle aspirationFine-needle aspiration is a minimally invasive diagnostic technique that uses a thin needle to extract cells or fluid from a tumor, lesion, or organ. This sample is then examined microscopically to make a diagnosis. or 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. 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. is often required to confirm 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.. This involves taking a small tissue sample and examining it under a microscope to determine the cell structure 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..
Additional diagnostic tests, such as X-rays or ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow., may be necessary to determine the extent of the disease and whether 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. has spread to other areas of the body.
Therapy
The primary treatment for hemangiopericytomas is the surgical removal 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.. The goal is to remove 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. completely to prevent recurrence. Since these tumors tend to be locally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery., the surgeon often has to remove a safety margin of healthy tissue around 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. as well.
In some cases, especially if 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. cannot be completely removed or has already metastasized, additional 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. or 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. may be considered. These therapies can help control 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. growth and improve the dog’s quality of life.
Post-operative care is crucial to avoid complications and support healing. Regular follow-up examinations are important to detect any recurrence 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. early on.
Prognosis and follow-up care
The prognosis for dogs with hemangiopericytomas is generally good if 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. can be completely removed. However, the tumors tend to recur locally, which is why careful monitoring is necessary.
If 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. metastasizes or cannot be completely removed, 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 less favorable. In such cases, 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. depends heavily on the location 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., the rate of growth, and the response to additional therapies.
Early detection and treatment are crucial for a positive 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., as they offer the best chance of removing 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. completely before it spreads.
Prevention
Since the exact causes of hemangiopericytomas are not fully known, there are no specific measures for the preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of these tumors. However, general care includes regular veterinary check-ups to detect skin changes or unusual lumps early.
A balanced diet and a healthy lifestyle can strengthen the dog’s general health and 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., which could potentially reduce the risk of developing tumors.
For owners of dogs belonging to breeds prone to hemangiopericytomas, it is particularly important to be vigilant and have any suspicious changes clarified by a veterinarian immediately to enable 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.
Outlook on current research
Current research on hemangiopericytomas in dogs focuses on several main areas, including the genetic and molecular basis of the disease, the development of new diagnostic methods, and the improvement of treatment approaches. Scientists are investigating the genetic mutations that could contribute to the development of hemangiopericytomas to better understand how these tumors develop and why they occur more frequently in certain dog breeds. By studying the molecular signatures of these tumors, researchers hope to identify specific biomarkers that could enable earlier and more accurate 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..
Another focus of research is the improvement of imaging techniques to detect and monitor hemangiopericytomas more efficiently. Advances in imaging technology, such as magnetic resonance imaging (MRI)Magnetic resonance imaging is an imaging technique that uses strong magnetic fields and radio waves to create detailed images of the inside of the body. It is used in veterinary medicine to diagnose diseases of the brain, spine, and other organs. and computed tomography (CT)Computed tomography (CT) is an imaging technique that uses X-rays and computer technology to create cross-sectional images of the body. It enables a detailed view of bones, organs, and other structures and is used for the diagnosis of injuries, diseases, and for planning medical interventions., provide more detailed images that allow veterinarians to assess the size, location, and growth of tumors more precisely. Some studies are also investigating the use of contrast agents that specifically target tumors to further improve the visibility of these formations.
At the therapeutic level, work is being done to develop new drugs and therapies that specifically target 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 without damaging the surrounding healthy tissue. Immunotherapy, which stimulates the dog’s 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. to fight 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. cells itself, is a promising approach currently in the experimental phase. Researchers are also investigating the possibility of making existing chemotherapeutic agents more effective by using them in combination with novel therapies.
Another interesting area of research is the comparison of hemangiopericytomas in dogs and humans. Since these tumors occur in both species, insights from human medicine could also provide valuable clues for veterinary medicine. This could lead to better networking of research and a faster exchange of knowledge, which could ultimately benefit both affected dogs and humans.
In summary, research on hemangiopericytomas in dogs is on a promising path, with the potential to significantly improve 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. and treatment of these tumors in the near future. Although many questions remain, ongoing studies offer hope for new insights and progress in veterinary medicine.