Superficial Necrolytic Dermatitis, SND (Superficial Degenerative Skin Inflammation) in Dogs
- Occurrence: very rare
- Location of illness: Skin/Fur
Superficial NecrolyticNecrolytic describes the process of dissolution or decomposition of dead or dying tissue. Necrolytic skin diseases in dogs and cats often lead to skin lesions characterized by the death of the upper layers of the skin. Dermatitis (SND), also known as “Hepatocutaneous 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.” or “metabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. epidermal necrosisNecrosis is the Death of tissue in a living organism, caused by factors such as injury, infection, or lack of blood supply. Necrotic tissue can cause Inflammatory conditions and further health problems.”, is a rare skin disease in dogs characterized by degenerative changes in the skin surface and systemic metabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. disorders.
The most important facts at a glance
Superficial Necrolytic Dermatitis (SND) is a complex skin disease in dogs that is often associated with systemic health problems such as liver diseases, diabetes mellitus, or pancreatic tumors. The disease is characterized by skin lesions, crusts, and pad fissures and can also cause severe pain. The exact causes are not fully known, but it is believed that impaired amino acid and proteinProteins are large molecules made up of amino acids and play an essential role in almost all biological processes. They are necessary for building body tissue, the function of the immune system, and as enzymes for metabolic reactions. synthesis plays a significant role. A liver abnormality can lead to a deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. of essential amino acids, which impairs the structural integrity of the skin. Oxidative 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 inflammatory conditions may also contribute to the development.
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. is based on clinical symptoms, skin biopsies, and tests to identify underlying diseases. Blood tests and imaging techniques are important to detect abnormalities. Treatment requires a holistic approach that addresses both the skin changes and the systemic diseases. A protein-rich diet, medications to support liver function, and, if necessary, amino acid supplements can help. If necessary, surgical interventions or targeted therapies may be required.
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 on the underlying cause, and 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 comprehensive treatment are crucial. Preventive measures focus on the early detection and treatment of liver problems and other systemic diseases. Research is investigating the biochemical mechanisms of the disease and possible genetic predispositions to develop targeted therapeutic approaches.
Causes
SND is a complex disease that is often associated with systemic health problems, especially liver diseases, diabetes mellitus, or pancreatic tumors. The exact pathophysiologyPathophysiology deals with the changes in physiological processes caused by diseases or injuries. It examines how these changes lead to the symptoms and signs of a disease. of the disease is not fully understood, but it is believed to be related to impaired amino acid and proteinProteins are large molecules made up of amino acids and play an essential role in almost all biological processes. They are necessary for building body tissue, the function of the immune system, and as enzymes for metabolic reactions. synthesis, which leads to skin changes. These metabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. disorders lead to an impairment of skin integrity and the formation of skin lesions.
A key aspect of the development of SND is the role of the liver. In many affected dogs, liver abnormalities are found that can lead to inadequate production and metabolism of proteins and amino acids. It is believed that this leads to a deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. of essential amino acids in the skin, which impairs the structural integrity of the skin and leads to the characteristic lesions.
In addition, there is evidence that oxidative 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 inflammatory conditions can also contribute to the pathologicalPathological refers to anything related to diseases or their processes. Pathological changes are those that deviate from the normal structure or function and indicate a disease. changes observed in SND. In some cases, 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. may also play a role, with certain dog breeds being more commonly affected than others.
Symptoms
The symptoms of SND are mainly dermatological, with characteristic skin changes that mostly occur on the paws, the nasal planum and the ears. The skin often shows thickening, redness, scaling and crusts. Often the lesions are symmetrically distributed.
In addition to the skin changes, dogs with SND may show systemic symptoms such as lethargy, loss of appetite, and weight loss. In advanced cases, severe liver dysfunctionDysfunction refers to an impaired or abnormal function of an organ or system in the body. This can be due to diseases, disorders, or damage and can affect the quality of life. may occur, which may cause additional systemic signs.
In some cases, nail changes may also be observed, such as brittleness or deformations of the claws. These symptoms can be painful for the dog and lead to an impairment of the quality of life.
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 SND is based on a combination of clinical symptoms, histopathologicalHistopathological refers to the microscopic examination of tissue samples for the diagnosis of diseases. This technique is used to identify the specific characteristics of diseases at the cellular level in dogs and cats. findings, and the identification of underlying systemic diseases. Skin 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 an important diagnostic tool in which characteristic histopathologicalHistopathological refers to the microscopic examination of tissue samples for the diagnosis of diseases. This technique is used to identify the specific characteristics of diseases at the cellular level in dogs and cats. changes, such as epidermal hyperplasiaHyperplasia refers to an increase in the number of cells in a tissue or organ, leading to enlargement. This can be a normal reaction or a sign of a disease., parakeratotic hyperkeratosis, and epidermal necrosisNecrosis is the Death of tissue in a living organism, caused by factors such as injury, infection, or lack of blood supply. Necrotic tissue can cause Inflammatory conditions and further health problems., can be detected.
In addition to skin 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., blood tests are important to identify systemic diseases that may be associated with SND, such as liver disease or diabetes mellitus. 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. or CT scans, can also be used to examine the liver and other internal organs for abnormalities.
It is important to distinguish SND from other dermatological diseases that can cause similar symptoms. A comprehensive diagnostic approach is crucial to make 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. and initiate the correct treatment.
Therapy
The treatment of SND requires a holistic approach that addresses both the skin changes and the underlying systemic diseases. Dietary 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. with a protein-rich and balanced diet can help improve skin health and alleviate symptoms.
Medications that support liver function, such as ursodeoxycholic acid or other hepatoprotective agents, may also be part of the treatment plan. In some cases, the administration of amino acids or zinc supplements may be indicated to compensate for deficiencies and promote skin healing.
In advanced cases or in the presence of tumors, surgical intervention or targeted 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 required. Continuous monitoring and adjustment of treatment are crucial to control the course of the disease and improve the quality of life of the affected dog.
Prognosis and follow-up care
The prognosis for dogs with SND is variable and depends heavily on the underlying cause and the 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. In cases where the underlying disease can be treated or controlled, the dog’s condition may improve, and the quality of life can be maintained.
However, SND is often associated with 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. and serious systemic diseases, which makes 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. generally cautious. 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 a comprehensive treatment approach are crucial to achieve the best possible results.
Regular follow-up and monitoring of health status are important to detect complications and adjust therapy as needed.
Prevention
Since SND is often associated with systemic diseases such as liver problems or diabetes mellitus, the preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of the underlying diseases is an important aspect. Regular health care, including blood tests and liver function tests, can help to detect and treat abnormalities early before SND develops.
A balanced diet and a healthy lifestyle are also important to promote the general health of the dog and reduce the risk of metabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. disorders. In dogs with 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., increased vigilance is required to recognize early signs of the disease and act quickly.
Although there is no specific preventive measure that can completely prevent SND, careful health monitoring and proactive care can reduce the risk of complications and improve the dog’s quality of life.
Outlook on current research
Superficial Necrolytic Dermatitis (SND), also known as superficial degenerative skin inflammation, is a rare but complex skin disease in dogs, primarily characterized by a combination of skin lesions and systemic disorders. Research on SND focuses on understanding the underlying causes, improved diagnostic methods, and the development of more effective treatment strategies. A key focus is on investigating the links between SND and liver diseases, as most affected dogs also have liver problems. Scientists are investigating the biochemical mechanisms that lead to skin changes in order to develop targeted therapeutic approaches.
New studies are exploring the role of amino acids and their deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones., as a striking feature of SND is a deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. of amino acids in the skin. Researchers are trying to find out whether the supplementationSupplementation is the addition of nutrients, vitamins, or other substances to a normal diet to compensate for deficiencies or to support general health and well-being. In dogs and cats, supplementation may vary depending on their health condition and nutritional needs. of certain amino acids has a therapeutic effect. In parallel, the influence of nutritional factors is being investigated to determine whether a special diet can alleviate the symptoms of the disease.
Another area of research is 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. to SND. Scientists are analyzing genetic patterns in affected dog breeds to identify possible genetic markers that indicate a susceptibility to the disease. This could lead to preventive measures in the future to identify and protect endangered dogs early on.
In diagnostics, emphasis is placed on the development of non-invasive techniques. Current research is investigating the use of advanced imaging techniques and blood tests to detect the disease early and distinguish it from other skin diseases. The aim is to shorten 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. time and improve treatment planning.
Therapeutically, clinical trials are testing the effectiveness of various drugs that aim to alleviate the symptoms. In addition to conventional treatments such as corticosteroidsCorticosteroids are a class of steroid hormones that occur naturally in the body and can also be produced synthetically. They have anti-inflammatory and immunosuppressive properties and are used in veterinary medicine to treat a variety of conditions. and antibiotics, new drugs are being tested that specifically address the biochemical changes in the skin. The effect of phototherapy as a complementary treatment method is also being investigated.
Research on SND is progressing continuously and offers hope for improved diagnostic and treatment options. These developments could not only improve the well-being of the affected dogs, but also provide valuable insights into related skin diseases in other species.
Frequently asked questions (FAQs)
-
What are the main symptoms of SND in dogs? The main symptoms of superficial necrolyticNecrolytic describes the process of dissolution or decomposition of dead or dying tissue. Necrolytic skin diseases in dogs and cats often lead to skin lesions characterized by the death of the upper layers of the skin. dermatitis in dogs are skin lesions, which usually occur on the paws, face, ears, and lower 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.. These lesions may be reddened, scaly, and thickened. Often the skin change is accompanied by severe itching. In addition to the skin symptoms, affected dogs may experience weight loss, lethargy, and a reduced zest for life.
-
Which dogs are most often affected by SND? Superficial necrolyticNecrolytic describes the process of dissolution or decomposition of dead or dying tissue. Necrolytic skin diseases in dogs and cats often lead to skin lesions characterized by the death of the upper layers of the skin. dermatitis occurs most often in middle-aged to older dogs, regardless of breed. However, some studies suggest that certain breeds, such as Western Terriers and Poodles, may be more susceptible. The exact cause for this disposition has not yet been fully clarified.
-
How is SND diagnosed? 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 SND is usually made through a combination of clinical examinations, skin biopsies, and blood tests. A comprehensive 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. and a careful physical examination are crucial. Skin biopsies can show specific histopathologicalHistopathological refers to the microscopic examination of tissue samples for the diagnosis of diseases. This technique is used to identify the specific characteristics of diseases at the cellular level in dogs and cats. features that indicate SND. Blood tests can also provide evidence of underlying liver diseases.
-
Can SND be cured? Currently, there is no cure for superficial necrolyticNecrolytic describes the process of dissolution or decomposition of dead or dying tissue. Necrolytic skin diseases in dogs and cats often lead to skin lesions characterized by the death of the upper layers of the skin. dermatitis. The treatment aims to alleviate the symptoms and improve the dog’s quality of life. This can be achieved through medication, special diets, and occasionally surgical interventions. 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 on the severity of the disease and the response to treatment.
-
What treatment options are available for dogs with SND? The treatment of SND usually involves the administration of medications such as corticosteroidsCorticosteroids are a class of steroid hormones that occur naturally in the body and can also be produced synthetically. They have anti-inflammatory and immunosuppressive properties and are used in veterinary medicine to treat a variety of conditions. to reduce inflammatory conditions, as well as antibiotics to prevent secondary infections. Dietary changes and the supplementationSupplementation is the addition of nutrients, vitamins, or other substances to a normal diet to compensate for deficiencies or to support general health and well-being. In dogs and cats, supplementation may vary depending on their health condition and nutritional needs. of amino acids can also be helpful. In some cases, surgical removal of damaged skin lesions may be necessary.
-
What role does nutrition play in the treatment of SND? Nutrition plays an important role in the treatment of SND. Since the disease is associated with a deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones. of amino acids, supplementing the diet with special amino acids or a protein-rich diet can help to alleviate the symptoms. It is important to adjust the dog’s diet in consultation with a veterinarian.
-
Are there preventive measures against SND? Since the exact cause of SND is not fully understood, there are currently no specific preventive measures. However, a balanced diet and regular veterinary examinations can help to maintain the dog’s general health and to recognize possible problems early on.
-
How does SND affect a dog’s life in the long term? In the long term, SND can significantly impair a dog’s quality of life, especially if the symptoms are severe and not effectively treated. Dogs may experience persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. itching, pain, and general discomfort. However, with appropriate treatment and care, the quality of life can be improved and the symptoms controlled.
-
How important is an 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. of SND? An 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. of SND is crucial for effective treatment. The earlier the disease is recognized, the better the symptoms can be managed and the 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 slowed down. Early intervention can significantly improve the dog’s quality of life and avoid possible complications.
-
Is SND in dogs contagiousContagious means infectious. Diseases that can easily be transmitted from one animal to another or from animals to humans are referred to as contagious. to other animals or humans? No, superficial necrolyticNecrolytic describes the process of dissolution or decomposition of dead or dying tissue. Necrolytic skin diseases in dogs and cats often lead to skin lesions characterized by the death of the upper layers of the skin. dermatitis is not contagiousContagious means infectious. Diseases that can easily be transmitted from one animal to another or from animals to humans are referred to as contagious.. It is not transmitted from dog to dog or from dog to human. It is a non-infectious disease caused by internal diseases or metabolicMetabolic refers to metabolism, i.e. the entirety of chemical processes that take place in a living organism to enable life processes. Metabolic disorders can cause a variety of Diseases in Dogs and cats. disorders of the affected dog.
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.