Adrenocortical Carcinoma (Adrenal Cortex Tumor) in Dogs
- Occurrence: very rare
- Location of disease: Abdomen/pelvis
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
An adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. is a rare, 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. 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 in the adrenal cortex of dogs, affecting the hormone-producing tissue of these glands.
BASICS and CAUSES:
The adrenal glands are small, triangular glands located above the kidneys. They consist of two main parts: the inner medulla and the outer cortex. The cortex is responsible for producing vital hormones such as cortisolCortisol is a steroid hormone produced in the adrenal cortex. It plays an important role in the body's stress response, as well as in the metabolism of proteins, lipids, and carbohydrates. Cortisol also helps regulate blood sugar levels and suppress the immune system., aldosteroneAldosterone is a hormone produced by the adrenal cortex. It regulates the body's salt and water balance by promoting sodium reabsorption in the kidneys, thereby influencing blood pressure., and sex hormones. These hormones regulate numerous bodily functions, including metabolism, blood pressure, and stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. responses.
In adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer., 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 grow uncontrollably in the adrenal cortex. This can lead to overproduction or, less commonly, underproduction of these hormones, causing various health problems. The exact causes for the development of these tumors are not fully understood, but genetic factors and possibly environmental factors play a role.
Genetic predispositions might play a role in certain dog breeds, although no specific breed has been clearly identified. There are indications that 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. stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. and environmental toxins could increase the risk, but further research is needed to definitively confirm these factors.
The most important facts at a glance
Adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. is a rare but aggressive 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. of the adrenal cortex in dogs, often hormonally active and clinically associated with Cushing’s syndromeA syndrome is a group of symptoms that occur together and indicate a specific disease or condition. A syndrome can be caused by various factors and is often complex in its diagnosis and treatment.. The primaryPrimary refers to the first or original cause of a disease or condition, as opposed to secondary causes or symptoms that develop from it. 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. consists of surgical removal, which requires precise 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 specialized surgical technique. In inoperable cases, medical control of hormoneHormones are chemical messengers produced by endocrine glands and released into the bloodstream to affect specific cells or organs in the body. They regulate numerous bodily functions, including growth, metabolism, and reproduction. production can be performed. 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. largely depends on 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. and resectability (how well 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. can be surgically removed).
Causes
The exact causes are unknown, but genetic factors may play a role.
- Hormonal Dysregulation: A 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. 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 adrenal cortex can lead to excessive cortisolCortisol is a steroid hormone produced in the adrenal cortex. It plays an important role in the body's stress response, as well as in the metabolism of proteins, lipids, and carbohydrates. Cortisol also helps regulate blood sugar levels and suppress the immune system. production. Rarer variants produce aldosteroneAldosterone is a hormone produced by the adrenal cortex. It regulates the body's salt and water balance by promoting sodium reabsorption in the kidneys, thereby influencing blood pressure. or sex hormones.
- Genetic Factors: While there is no clearly defined breed 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 adrenocortical carcinomas in dogs, a familial accumulation is discussed in individual cases. In human medicine, mutations in 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. suppressor genes (e.g., TP53) are known, and their transferability to veterinary medicine is being researched.
- Breed Prevalence: Certain dog breeds like Poodles, Dachshunds, and Beagles more frequently show Cushing’s syndromeA syndrome is a group of symptoms that occur together and indicate a specific disease or condition. A syndrome can be caused by various factors and is often complex in its diagnosis and treatment. – however, this is mostly pituitary-dependent. An adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. as a cause is possible, but overall less common.
The exact pathogenesisPathogenesis describes the process of the origin and development of a disease, including the mechanisms that lead to the disease's symptoms and signs. of adrenocortical carcinomas is not conclusively understood. Genetic factors, 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. hormonal dysregulations, and environmental carcinogens are suspected to promote their development. In human medicine, a familial accumulation within 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. syndromes has been described, but this has not yet been proven in dogs. Hormonally active carcinomas can be influenced by autocrine growth stimulation. Adrenocortical adenomas can degenerate, but a transition to a carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. is rarely documented. A connection with previous glucocorticoid 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 not clearly established but is the subject of ongoing research.
Symptoms
The symptoms of an adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. can be diverse and often depend on 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. is hormonally active. Owners frequently report increased thirst and urination in their dogs. This symptom is often accompanied by a changed appetite, which can be either increased or decreased.
Dogs may also show signs of Muscle weakness or wasting, especially in the hind legs. Furthermore, changes in coat or skin problems may occur, such as Hair loss and thin, sensitive skin. In some cases, dogs may also experience Weight gain or develop a bloated abdomenThe abdomen, also known as the abdominal cavity, is the part of the body located between the rib cage and the pelvis. It houses several important organs, including the stomach, liver, kidneys, intestines, and spleen., which can indicate an enlarged liver or spleen.
In advanced cases or 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. has metastasized, general weakness, lethargy, and in some cases, neurological symptoms such as Behavioral changes or Convulsions may occur. Since the symptoms are so varied, an 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. is crucial.
In summary:
A combination of thirst and increased urination (PU, PD) + Polyphagia (increased appetite) + skin/muscle changes suggests Cushing’s syndromeA syndrome is a group of symptoms that occur together and indicate a specific disease or condition. A syndrome can be caused by various factors and is often complex in its diagnosis and treatment..
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 an adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. 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.. Blood tests are essential to check hormoneHormones are chemical messengers produced by endocrine glands and released into the bloodstream to affect specific cells or organs in the body. They regulate numerous bodily functions, including growth, metabolism, and reproduction. levels and rule out other possible causes of the symptoms. A special test known as the ACTH stimulation testThe ACTH stimulation test is a diagnostic procedure used to check the function of the adrenal cortex. It tests the adrenal glands' response to adrenocorticotropic hormone (ACTH) to diagnose conditions such as Cushing's disease or Addison's disease in dogs and cats. can be used to assess adrenal glandThe adrenal gland is a glandular organ located above the kidneys in dogs and cats that produces hormones such as epinephrine, norepinephrine, and corticosteroids. These hormones are important for the stress response, metabolism, and electrolyte balance. function.
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. 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. are helpful to determine 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. and to ascertain whether it has spread to surrounding tissue or formed 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.. An MRI may also be performed to obtain more detailed information. 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 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., especially if a 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. 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 suspected.
In some cases, scintigraphy may be used to further evaluate adrenal glandThe adrenal gland is a glandular organ located above the kidneys in dogs and cats that produces hormones such as epinephrine, norepinephrine, and corticosteroids. These hormones are important for the stress response, metabolism, and electrolyte balance. function. These comprehensive diagnostic measures are crucial for determining the best treatment strategy.
Therapy
The primary 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. for an adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. consists of 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., if possible. The surgery can be complicated, especially if the tumor is large or has spread to surrounding tissue. In some cases, complete removal is not possible, and palliative treatment is considered.
After surgery, 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. 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. may be used to combat remaining cancer cells. The choice of treatment often depends on the size 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., its location, and the presence of 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.. HormoneHormones are chemical messengers produced by endocrine glands and released into the bloodstream to affect specific cells or organs in the body. They regulate numerous bodily functions, including growth, metabolism, and reproduction. therapies may also be used to alleviate symptoms, 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. was hormonally active.
Medications to control hormoneHormones are chemical messengers produced by endocrine glands and released into the bloodstream to affect specific cells or organs in the body. They regulate numerous bodily functions, including growth, metabolism, and reproduction. production and alleviate symptoms can also be part of the treatment. Close monitoring of the dog through regular veterinary visits is crucial to evaluate treatment success and detect possible complications early.
Prognosis and follow-up care
The prognosis for dogs with an adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. varies greatly and depends on several factors, including the size 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 presence of 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., and the response to treatment. 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 detected early and 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. can be relatively favorable.
In cases 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. has metastasized or cannot be completely removed, the prognosis is generally poorer. Life expectancy can then be limited to months, depending on the 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. and the chosen treatment strategy.
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 are crucial to improve the dog’s quality of life and optimize 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.. Regular follow-up examinations are necessary to detect 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. recurrence or the appearance of 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. early.
Prevention
Adrenocortical carcinoma cannot be safely prevented, but early detection significantly improves 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.. Regular preventive examinations with blood and hormone profiles, especially in older dogs, are recommended. Symptoms such as increased drinking, Hair loss, Muscle weakness, or unusual Weight gain should be taken seriously. Avoiding unnecessary hormonal medications can reduce the risk of hormone-related changes. For genetically predisposed breeds, close monitoring is advisable. 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 of the abdomenThe abdomen, also known as the abdominal cavity, is the part of the body located between the rib cage and the pelvis. It houses several important organs, including the stomach, liver, kidneys, intestines, and spleen. can also reveal changes in the adrenal glands at an early stage.
Outlook on current research
Adrenocortical carcinoma in dogs is a rare but serious disease affecting the adrenal cortex. The adrenal cortex is responsible for producing vital hormones like cortisolCortisol is a steroid hormone produced in the adrenal cortex. It plays an important role in the body's stress response, as well as in the metabolism of proteins, lipids, and carbohydrates. Cortisol also helps regulate blood sugar levels and suppress the immune system.. Current research investigates how genetic factors can contribute to the development of these tumors. Researchers analyze genetic markers that are more common in dogs with this disease to gain a better understanding of the causes and potential hereditary components.
Another focus of research is on improving diagnostic methods. Currently, 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. and CT scans are used to locate and assess tumors. New techniques under development could improve the accuracy and timeliness of 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.. Research into the development of biomarkers that can be detected in the blood is particularly promising, as they could potentially enable non-invasive 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..
Treatment options for adrenocortical carcinomas are also an active field of research. Surgical removal of the affected adrenal glands is currently the most common form of 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.. Researchers are working to optimize surgical techniques to reduce the risk of complications and shorten recovery time. Furthermore, the effectiveness of 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 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. as complementary treatment methods is being investigated. New drugs that specifically target the molecular properties 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 are also being tested in preclinical and clinical studies.
Another important aspect of research is understanding disease progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. and the factors that influence survival. Long-term studies in affected dogs help to document the natural progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. of the disease and assess the impact of different treatment strategies on the dogs’ quality of life. These studies provide valuable information that can help develop personalized treatment plans tailored to the individual needs of each dog.
In summary, research into adrenocortical carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer. in dogs aims to deepen the understanding of the genetic and molecular basis of the disease, 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 options, and ultimately enhance 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. and quality of life for affected dogs. Advances in research could also reveal potential parallels for treating this disease in humans, which could advance knowledge and therapies in both areas.
Frequently asked questions (FAQs)
What is an adrenocortical carcinoma?
What symptoms do dogs with adrenocortical carcinoma show?
How is an adrenocortical carcinoma diagnosed?
What treatment options are available for dogs with this disease?
What is the prognosis for dogs with adrenocortical carcinoma?
Can adrenocortical carcinoma be inherited in dogs?
Are certain dog breeds more susceptible to this disease?
How can I help my dog recover after surgery?
Are there ways to reduce the risk of adrenocortical carcinoma?
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Literature