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What is juvenile idiopathic arthritis?WWhat is juvenile idiopathic arthritis?What is juvenile idiopathic arthritis?EnglishRheumatologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemNAAdult (19+)Joint or muscle pain;Pain2017-01-31T05:00:00ZJennifer Stinson RN-EC, PhD, CPNPLori Tucker, MDAdam Huber, MSc, MD, FRCPCLynn Spiegel, MD, FRCPCLaura Schanberg, MDPatrick McGrath, OC, PhD, FRSC8.0000000000000062.0000000000000495.000000000000Flat ContentHealth A-Z<p>JIA can occur in young people, up to age 16. Discover the differences in arthritis between young people and adults, how common arthritis is in young people, and how it can affect the joints.</p><p>The word arthritis comes from the Greek words "arthron" meaning "joint," and "itis", meaning inflammation. Thus, arthritis is inflammation in the joints, the places where the bones come together. Many people think that arthritis is something only old people get. Children and teenagers get a type of arthritis called juvenile idiopathic arthritis (JIA). "Juvenile" means young (16 years of age or younger) and "idiopathic" means the cause is not known. JIA is also sometimes called juvenile rheumatoid arthritis (JRA).</p><h2>Key points</h2><ul><li>Arthritis is inflammation in the joints, the places where the bones come together.</li><li>JIA affects about 10,000 children and teens in Canada.</li><li>Symptoms of joint inflammation include redness, swelling, warmth, stiffness, and pain.</li></ul>
L'AIJ, c’est quoi?LL'AIJ, c’est quoi?What is Juvenile Idiopathic Arthritis?FrenchRheumatologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemNAAdult (19+)Joint or muscle pain;Pain2017-01-31T05:00:00ZJennifer Stinson RN-EC, PhD, CPNPLori Tucker, MDAdam Huber, MSc, MD, FRCPCLynn Spiegel, MD, FRCPCLaura Schanberg, MDPatrick McGrath, OC, PhD, FRSC8.0000000000000062.00000000000000Flat ContentHealth A-Z<p>Cette page décrit l'arthrite chez les jeunes, jusquà l'age de seize ans. Elle explique les différences entre l'arthrite chez les jeunes et l'arthrite chez les adultes, présente la fréquence de l'arthrite juvénile et décrit les effets de la maladie.</p><p>Le mot arthrite vient du mot grec « arthron », qui signifie articulation, et de la terminaison « ite », qui signifie inflammation. Donc, arthrite signifie l’inflammation des articulations, soit l’endroit où les os se rejoignent.</p> <p>C’est une croyance répandue que l’arthrite ne se développe que chez les personnes âgées. Toutefois, l’arthrite se développe également chez les enfants et les adolescents. C’est ce qu’on appelle l’arthrite idiopathique juvénile (AIJ). « Juvénile » signifie les jeunes de seize ans ou moins, et « idiopathique » signifie que l’on n’en connaît pas la cause. L’AIJ est parfois appelée arthrite rhumatoïde juvénile (ARJ) ou polyarthrite rhumatoïde juvénile. </p><h2>À retenir</h2> <ul><li>L’arthrite est l’inflammation des articulations, là où les os se rejoignent.</li> <li>L’arthrite idiopathique juvénile atteint quelque 10 000 enfants et adolescents canadiens.</li> <li>L’arthrite a pour symptômes des rougeurs, une enflure, une sensation de chaleur, de la raideur et de la douleur.</li></ul>

 

 

What is juvenile idiopathic arthritis?1049.00000000000What is juvenile idiopathic arthritis?What is juvenile idiopathic arthritis?WEnglishRheumatologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemNAAdult (19+)Joint or muscle pain;Pain2017-01-31T05:00:00ZJennifer Stinson RN-EC, PhD, CPNPLori Tucker, MDAdam Huber, MSc, MD, FRCPCLynn Spiegel, MD, FRCPCLaura Schanberg, MDPatrick McGrath, OC, PhD, FRSC8.0000000000000062.0000000000000495.000000000000Flat ContentHealth A-Z<p>JIA can occur in young people, up to age 16. Discover the differences in arthritis between young people and adults, how common arthritis is in young people, and how it can affect the joints.</p><p>The word arthritis comes from the Greek words "arthron" meaning "joint," and "itis", meaning inflammation. Thus, arthritis is inflammation in the joints, the places where the bones come together. Many people think that arthritis is something only old people get. Children and teenagers get a type of arthritis called juvenile idiopathic arthritis (JIA). "Juvenile" means young (16 years of age or younger) and "idiopathic" means the cause is not known. JIA is also sometimes called juvenile rheumatoid arthritis (JRA).</p><h2>Key points</h2><ul><li>Arthritis is inflammation in the joints, the places where the bones come together.</li><li>JIA affects about 10,000 children and teens in Canada.</li><li>Symptoms of joint inflammation include redness, swelling, warmth, stiffness, and pain.</li></ul><figure><span class="asset-image-title">How the knee joint moves</span> <div class="asset-animation"> src="https://akhpub.aboutkidshealth.ca/Style%20Library/akh/swfanimations/swf.html?swffile=Knee_joint_movement_JIA_MED_ANI_EN.swf" </div> <figcaption class="asset-image-caption">The main movements of the knee joint are flexion (bending) and extension (straightening). There is also rotation and sliding of the femur on the tibia. The movement is controlled by the muscles and ligaments in and around the knee.</figcaption></figure> <p>Inflammation occurs when the body reacts to infection, irritation or other injury. Symptoms of inflammation include redness, warmth, swelling and pain. Arthritis means you have inflammation in your joints.</p><p>Here are some differences between arthritis in children/teenagers and arthritis in adults:</p><ul><li>Osteoarthritis, a common form of arthritis in adults, is not common in young people with JIA.</li><li>It may take longer for young people with JIA to be diagnosed because many people (even some doctors) don’t realize young people can get arthritis.</li><li>JIA in young people may affect their growth. If the JIA affects many joints or other body systems, they may grow more slowly overall. On the other hand, if only one joint such as the knee is affected, the inflammation can cause more blood flow to that joint and make that part of the body grow faster. Injury can also occur to the growth plates , which may cause growth to be slower in some children or teens.</li><li>Children and teenagers with JIA may also get inflammation in their eyes.</li><li>Medications used to treat JIA are generally the same in all age groups. However, doses need to be adjusted for children and teenagers based on their weight.</li></ul><h2>How common is JIA ?</h2><ul><li>JIA affects about 10,000 (one in 1000) children and teenagers in Canada .</li><li>Four times as many girls as boys get JIA.</li></ul><h2>How does JIA affect the joints?</h2><p>Look at the illustration below of a healthy joint and a joint with arthritis. See if you can pick out the differences between them. </p> <figure class="asset-c-100"><span class="asset-image-title">Normal vs. arthritic joint</span><img src="https://assets.aboutkidshealth.ca/akhassets/Joint_normal_vs_arthritic_MED_ILL_EN.png" alt="Normal knee joint and arthritic knee joint" /> </figure> <p>In a healthy joint, a special sac called the articular capsule surrounds the space between two bones. The inner lining of this sac is called the synovial lining. The synovial lining makes a fluid that keeps the joint slippery. This fluid is similar to motor oil that keeps the parts of a car engine working properly. The ends of the bones are covered with a smooth substance called cartilage. The cartilage allows the bone ends to glide easily across each other.</p><p>In JIA, changes in the immune system cause the lining of the sac to become inflamed and thickened. Extra fluid is produced, which contains inflammatory cells. These inflammatory cells make and release substances that can cause the symptoms of joint inflammation. These symptoms include warmth, stiffness, swelling, and pain. If left untreated, joint inflammation can damage the cartilage and underlying bone.</p>https://assets.aboutkidshealth.ca/AKHAssets/what_is_jevenile_ideopathic_arthritis.jpgWhat is juvenile idiopathic arthritis?False

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