Chemodectoma, carotid artery paraganglioma (tumor in the carotid artery) in Dogs
- Synonyms: Synonyms: Chemodectoma, glomus tumor
- Occurrence: very rare
- 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
A chemodectoma, also known as a carotid arteryThe carotid artery (A. carotis, Halsschlagader) is an important blood vessel that transports oxygen-rich blood from the heart to the head and brain. In dogs and cats, as in humans, it divides into two main branches: the internal and external carotid arteries. The internal carotid artery supplies blood to the brain, while the external carotid artery carries blood to the parts of the head outside the brain. paraganglioma, 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. 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 arises from the chemoreceptors of the carotid arteryThe carotid artery (A. carotis, Halsschlagader) is an important blood vessel that transports oxygen-rich blood from the heart to the head and brain. In dogs and cats, as in humans, it divides into two main branches: the internal and external carotid arteries. The internal carotid artery supplies blood to the brain, while the external carotid artery carries blood to the parts of the head outside the brain. (Arteria carotis). These tumors can compress surrounding tissue and often lead to clinical symptoms due to their location and size.
The most important facts at a glance
A chemodectoma, also known as a carotid artery paraganglioma, is 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. that arises from the chemoreceptors in the carotid arteryThe carotid artery (A. carotis, Halsschlagader) is an important blood vessel that transports oxygen-rich blood from the heart to the head and brain. In dogs and cats, as in humans, it divides into two main branches: the internal and external carotid arteries. The internal carotid artery supplies blood to the brain, while the external carotid artery carries blood to the parts of the head outside the brain. of dogs. These receptors are responsible for regulating breathing by reacting to changes in blood chemistry. The exact cause 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 not fully understood, but genetic factors play a role, as certain breeds like Boxers and Boston Terriers are more frequently affected. Environmental factors leading to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. oxygen deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. could also be involved.
Symptoms of a chemodectoma can include RespiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, Congestive heart failure, Cough, and reduced exercise tolerance. For 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., a thorough examination is performed, supplemented by imaging techniques such as 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., CT, or MRI. 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. may be necessary to determine the 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.. 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. depends on 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. size and the dog’s health; 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. is often the goal. In cases where surgery is not possible, palliativePalliative refers to treatments that aim to alleviate the symptoms of a disease without curing the disease itself. Palliative care focuses on improving the quality of life of patients with incurable diseases. 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. can be provided.
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. varies depending on 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. type and treatment method. Regular follow-up examinations are important to monitor for 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. regrowth. Since the exact causes are not fully known, there are no specific preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. measures. However, regular veterinary check-ups and avoiding environmental factors that could cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. hypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure. are recommended.
Causes
The arteria carotis is a main arteryAn artery is a blood vessel that carries blood away from the heart. Unlike veins, which return deoxygenated blood to the heart, arteries transport oxygen-rich blood to the body's tissues. in the neck that supplies the brain with blood. At its origin are chemoreceptors that respond to changes in blood chemistry, such as oxygen and carbon dioxide concentrations. These chemoreceptors are part of the so-called carotid body, which plays an important role in the regulation of breathing.
A chemodectoma arises from the chief cells of these chemoreceptors. The exact cause of a chemodectoma is not fully understood. However, it is believed that genetic factors may play a role, as certain dog breeds are more prone to developing these tumors. Otherwise, there is evidence that environmental factors leading to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. hypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure. might also play a role.
In dogs, certain breeds such as the Boxer and Boston Terrier are more frequently affected. This suggests a genetic 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.. It is suspected that these breeds may have genetic mutations that increase the risk 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. formation.
Symptoms
The symptoms of a chemodectoma vary 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 the early stages of the disease, there are often no obvious symptoms. However, as 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. grows, signs may appear caused by the compression of surrounding structures.
The most common symptoms include RespiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, which can result from pressure on the windpipe. Some dogs also show symptoms like a Cough or breathing noises. In advanced cases, difficulty swallowing may occur 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. affects the esophagusThe esophagus is a muscular tube that connects the pharynx to the stomach. It transports food from the mouth to the stomach through rhythmic contractions (peristalsis)..
Another possible symptom is a Swelling in the neck area, which can be detected during physical examination. This Swelling can be painful and cause the animal to spare the affected area or avoid being touched.
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 chemodectoma usually begins with a thorough clinical examination and a detailed medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. to identify previous symptoms or breed predispositions. Imaging techniques are crucial for 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 assessing 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. size and its relationship to surrounding structures.
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. examinations or X-rays can be used initially to identify a 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). in the neck area. However, 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. or 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. provides a more detailed view 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 its extent.
For 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., 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. is often required to perform cytological or histological examinations. These procedures allow for confirmation 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. type and assessment of the cell structure to distinguish between 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. and malignantMalignant means "cancerous" and is used to describe tumors or neoplasms that grow invasively and have the ability to metastasize. Malignant tumors can cause serious health problems in dogs and cats. tumors.
Therapy
The therapy for a chemodectoma depends on the size, location, and general health of your dog. In many cases, 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. is considered, 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. is causing symptoms or if there is a risk of malignantMalignant means "cancerous" and is used to describe tumors or neoplasms that grow invasively and have the ability to metastasize. Malignant tumors can cause serious health problems in dogs and cats. growth.
However, surgical procedures can be complex because the tumor is located near vital structures like the carotid arteryThe carotid artery (A. carotis, Halsschlagader) is an important blood vessel that transports oxygen-rich blood from the heart to the head and brain. In dogs and cats, as in humans, it divides into two main branches: the internal and external carotid arteries. The internal carotid artery supplies blood to the brain, while the external carotid artery carries blood to the parts of the head outside the brain.. Careful planning and execution by an experienced surgeon are crucial to minimize complications.
In some cases, primarily in older dogs or when 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 inoperable, palliativePalliative refers to treatments that aim to alleviate the symptoms of a disease without curing the disease itself. Palliative care focuses on improving the quality of life of patients with incurable diseases. 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. may be considered. This can include administering medication to relieve symptoms or using 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. to 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.
Prognosis and follow-up care
The prognosis for dogs with a chemodectoma varies depending on the size and aggressiveness 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. as well as the treatment method used. Benign tumors that can be completely removed surgically often have a better 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..
For malignantMalignant means "cancerous" and is used to describe tumors or neoplasms that grow invasively and have the ability to metastasize. Malignant tumors can cause serious health problems in dogs and cats. tumors or those that cannot be completely removed due to their location, 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 more guarded. Quality of life and life expectancy can be improved through palliativePalliative refers to treatments that aim to alleviate the symptoms of a disease without curing the disease itself. Palliative care focuses on improving the quality of life of patients with incurable diseases. measures, but the long-term outlook is often uncertain.
Regular follow-up examinations are crucial to monitor for any tumor regrowth and to take further treatment measures if necessary.
Prevention
Since the exact causes of chemodectoma development are not fully understood, there are no specific measures for the prevention of these tumors. However, the genetic 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. in certain breeds means that breeding animals should be selected carefully to minimize the risk. Regular veterinary check-ups are important to detect signs of a chemodectoma or other health problems early on. 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 intervention can significantly improve the prognosis. Avoiding environmental factors that could cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. hypoxiaHypoxia refers to a condition in which the body or a part of the body is not supplied with enough oxygen. This can lead to various symptoms, including shortness of breath, confusion, and in severe cases, organ failure., such as smoking near pets or living in highly polluted areas, could theoretically reduce the risk, although this has not been specifically proven.
Outlook on current research
In the case of chemodectoma (paraganglioma of the aortic or carotid body; “heart base tumor”), research mainly focuses on earlier detection and gentler 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.. Imaging is becoming more precise: high-resolution heart 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., CT/MRI, and 3D reconstructions help to better visualize the size, location relative to the aorta/heart, and possible narrowing of the airway or esophagusThe esophagus is a muscular tube that connects the pharynx to the stomach. It transports food from the mouth to the stomach through rhythmic contractions (peristalsis).. This allows for more individualized procedures and 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. plans. 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 particularly important: fractionated or stereotactic procedures are being developed to target 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. precisely while sparing surrounding tissue. In terms of medication, researchers are testing whether targeted agents (e.g., tyrosine kinase inhibitors or anti-angiogenic therapies) can slow growth when surgery 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. is not enough. At the same time, researchers are looking for risk factors: Why are brachycephalic breeds more frequently affected? What role does chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. oxygen deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. play? Genetic markers and measurements of oxygen supply could help with preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. in the future. For dogs with pericardialPericardial refers to anything related to the pericardium, the sac that surrounds and protects the heart. Pericardial diseases can affect heart function and often require specialized veterinary care. effusion, minimally 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. relief and better-planned follow-up intervals are being evaluated so that shortness of breath and collapse occur less frequently. The goal is a combination of 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., safe local control, and good quality of life – especially for older dogs where major surgery is often not an option.