Autoimmune diseases in children may be linked to genetic, environmental, and hormonal factors. An autoimmune condition might develop when our immune system misinterprets and attacks healthy cells or tissues in the body as antigen or foreign bodies. Around 80 autoimmune diseases are present; however, not all can affect children (1). There may not be specific signs and symptoms in autoimmune illnesses, and doctors may do some tests to exclude other possible conditions while diagnosing. Read on to know more about the causes, symptoms, and management of autoimmune diseases in children.
14 Autoimmune Diseases In Children
These diseases fall into two categories, namely localized and systemic. Localized diseases affect a particular organ such as liver, thyroid, and adrenal glands, while systemic autoimmune diseases spread to multiple organs from skin to kidneys and heart. The disorders can affect any part of your child’s body, including:
Blood vessels Connective tissues Endocrine glands such as the thyroid or pancreas Joints Muscles Red blood cells
1. Addison’s disease
It is also called pediatric adrenal insufficiency, and it occurs when the adrenal glands do not produce sufficient cortisol and aldosterone. These hormones regulate the child’s metabolism, immune system, and the levels of sodium and potassium in the body (2). Addison’s disease is rare.
2. Psoriasis
Itchy, dry patches on skin could point towards psoriasis. This could be due to an autoimmune condition or caused by a bacterial infection on the skin. Children could get this disease through genetics or because of other autoimmune diseases such as Crohn’s disease, type I diabetes, and Rheumatoid Arthritis. This disease causes inflammation and along with skin may involve joints as well (3).
3. Autoimmune liver disease
It is also known as autoimmune hepatitis. It is an inflammatory disorder that damages the liver and can lead to cirrhosis, if progresses. Type I is less common in children. Type II, too, is rare but more common than type I. It usually affects girls of two to 14 years of age (4).
4. Autoimmune thyroiditis (AT)
Autoimmune thyroiditis usually occurs in adolescents, but can present even in younger children. This is a common acquired cause of thyroid disease in children. AT can be either hypothyroidism or hyperthyroidism. Genes and environmental factors cause the disease in children (5).
5. Celiac disease
This digestive disorder affects the small intestine, and is triggered in genetically predisposed child if the child eats foods such as wheat, barley, and rye and cooked food, etc which contain the protein gluten. One in 141 people in the US have this disorder, but most remain oblivious to it (6). Girls are more vulnerable than boys, and it can also be hereditary.
6. Henoch-Schonlein purpura (HSP)
In an HSP affected child, the inflamed skin leaks red blood cells causing rashes in the legs, buttocks, and arms. The condition can also target the internal organs. In the US, HSP occurs in 20 per every 100,000 children, and boys are more vulnerable than girls. This kind of autoimmune rashes in children can develop between two and 11 years of age (7).
7. Immune (or idiopathic) thrombocytopenia purpura (ITP)
In this condition, the immune system destroys the platelets (blood cells that help in clotting of blood) in the child’s body, mostly in the spleen (8). Therefore, when their count is low, bleeding could become uncontrollable. Medical practitioners are yet to know the cause of the condition, sometimes, it could also be the result of a non-contagious virus. Also, ITP could occur if the child has any other autoimmune disorders.
8. Juvenile arthritis (JA)
Also called pediatric rheumatic disease, JA can affect children aged below 16 years. Nearly 300,000 children in the US are affected with this condition (9). JA is a collective name given to various rheumatic diseases in children, affecting different body parts from musculoskeletal system to eyes, skin, muscles, and gastrointestinal tract.
9. Juvenile dermatomyositis
Juvenile dermatomyositis is an inflammation of muscles (myositis), as the faulty immune system attacks blood cells throughout the child’s body. The condition is very rare as three in one million children are affected in the US every year (10). It mostly occurs in children of five to ten years of age.
10. Juvenile scleroderma
This autoimmune disease is characterized by the formation of thick skin patches due to the excess production of collagen. There are two types, localized scleroderma which affects only the skin, and systemic scleroderma where, in addition to the skin, internal organs such as kidneys, heart and gastrointestinal tract are affected. Girls are more vulnerable than boys. The US has just about 5,000 to 7,000 children suffering from this rare disease. Among those affected, 1.5% get it before 10 years of age while 7% develop it between 10 and 19 years (11).
11. Kawasaki’s disease
The rare disease occurs due to inflammation of the muscles in the body, and when left untreated, it might affect the coronary vessels in the heart. It starts with a fever, a skin rash and swollen lymph nodes in the neck, which continues for around five days. Children aged below five years are susceptible, and one in 10,000 children are affected (12).
12. Pediatric lupus (SLE)
Systemic lupus erythematosus or lupus happens in many forms and damages joints, skin, kidneys, heart, lungs, blood vessels, and brain among other organs. The disease is uncommon in children below five years, but 15% of those affected by the disorder are younger than 18 years (13).
13. Type 1 diabetes (juvenile)
Type 1 diabetes is an autoimmune disease where the pancreas stops producing insulin hormone. The disease can develop at any age but is more common in people aged below 20 years. Over 200,000 youth below 20 years are estimated to be suffering from this disease in the US (14).
14. Multiple autoimmune syndrome (MAS)
MAS is the combination of three or more autoimmune diseases in a person. One of the disorders pertains to skin – either scleroderma or psoriasis. Around 25% of the people suffering from an autoimmune disease are likely to get more autoimmune disorders (15). Autoimmune disorders can target any part of our body. And why do they do so? Unfortunately, medical fraternity is yet to understand the exact cause for these immunological diseases and conditions.
Why Do Some Children Have Autoimmune Diseases?
Autoimmune diseases are ‘idiopathic’ meaning that their cause is unknown. However, based on some common traits, scientists believe that a combination of multiple factors causes the diseases: So while genes make an individual susceptible, environmental factors may act as triggers for various autoimmune diseases. Note: Studies are still ongoing to identify the genes that cause pediatric immune disorders, environmental and hormonal factors influencing them.
Symptoms Of Autoimmune Diseases In Children
There are no specific symptoms that can be associated with these disorders. Most of the time, symptoms depend on the organs involved. However, the most prevalent symptoms and signs are:
Infection and inflammation of internal organs Cramps, loss of appetite, diarrhea, nausea and other digestive problems Delayed growth and development Prolonged fever Anemia or low platelet counts Frequent sinus infection, pneumonia, bronchitis Joint pain Ear infections Meningitis Skin infections General ill-feeling (malaise) Rashes Dry eyes and mouth Hair loss Weight loss
All the above symptoms are non-specific in the sense that they need not necessarily point at an autoimmune disorder but could be a simple, temporary health problem. Note: Most of the symptoms like fatigue, swelling, and rashes come occasionally and go away. However, if your child is suffering from these symptoms frequently, it could be indicative of a health problem. In such cases, take them to a pediatrician for further analysis and diagnosis.
Diagnosis Of Degenerative Autoimmune Diseases
Diagnosis is a challenge for doctors as the symptoms are not unique to autoimmune disorders. The doctor would initially do a physical examination and understand the child’s medical history. Later, he may recommend various tests based on the affected organs: Antinuclear antibody tests: Antinuclear antibody (ANA) test is the primary test done to diagnose autoimmune disorders. ANA are the autoantibodies that attack the matter present in the nucleus of a cell. ANA test is done using two methods, indirect fluorescent antibody (IFA) and immunoassay. In IFA, the affected child’s blood sample is combined with cells. If antibodies are present in blood, they react with the cells. Immunoassays are less accurate than IFA (20). The doctor may recommend other autoantibody tests along (21) with ANA, to observe specific substances within cell nuclei. Once the doctor diagnoses the cause and understands the severity of the problem, he will recommend certain changes in the child’s diet and routine if the disorder is minor or temporary. So, would those minor changes be enough to address the problem? No, serious diseases need medical intervention.
Ways To Manage Autoimmune Diseases In Children
These methods cannot cure autoimmune diseases, as there is no cure for them. The available options aim at reducing the symptoms, controlling the damage done by autoimmunity, and maintaining the body’s ability to fight the disease. Each childhood autoimmune disease has unique management steps but commonly include (22) (21): Depending on your child’s autoimmune disease, they may need other kinds of medical treatment, such as: The pain, inflammation, and the trouble associated with the conditions could be traumatic for the child. Along with medication and physical therapy, he might need psychotherapy or counseling to be strong during these testing times. In addition to taking the child to the doctor, what can you do? Support the child by taking precautions such as giving an allergen-free diet, nutritional supplements like vitamin B and C, and healthy lifestyle changes. Autoimmune diseases in childhood occur as the immune system fails to differentiate between an individual’s body and foreign antibodies. They can attack any one or multiple organs. While a few could be long-term disorders, some might disappear in a few days. As a parent, you need to be strong and make your child feel as normal as possible lest it affects her psyche. Take care of her routine, and food consumption to make the problem less worrisome.
For instance, researchers at the Medical College of Wisconsin have found that systemic sclerosis increased the risks for lung cancer by five times, liver cancer by three times, and nonmelanoma skin cancer by four times (25). According to a study in Shanghai, the risk of esophageal cancer increased 2.4 fold in patients with autoimmune diseases.
Digestive system: gastroenterologist; Kidneys: Nephrologist Joints and connective tissue disorders: Rheumatologists
