About Polyarticular Juvenile Idiopathic Arthritis
Polyarticular juvenile idiopathic arthritis is an autoimmune disorder where the immune system mistakenly attacks the joints, causing inflammatory arthritis. The exact cause of JIA is unknown, but it is believed to result from a combination of genetic and environmental factors. Here are the key points to consider:
Pathophysiologic causes:
- JIA is an autoimmune disorder, meaning the immune system mistakenly attacks the body's own tissues, specifically the joints.
- The immune system's inflammatory response in JIA is prolonged, leading to excessive inflammation in and around the joints.
- Changes in certain genes, including those related to the human leukocyte antigen (HLA) complex, may influence the risk of developing JIA.
Non-modifiable risk factors:
- Genetic risk factors play a role in JIA development.
- Family history of autoimmune diseases or JIA increases the risk.
Modifiable risk factors:
- Environmental triggers, such as infections, may contribute to the development of JIA.
- Gut microbiota has been suggested as a potential modifiable risk factor for JIA.
It's important to note that while these factors may increase the risk of developing JIA, they do not guarantee its occurrence. If you have concerns about your child's risk or symptoms, it's best to consult with a healthcare professional.
Common early symptoms of polyarticular juvenile idiopathic arthritis include:
- Joint pain
- Swelling
- Warmth
- Stiffness
- Skin changes, such as rashes
As the disease progresses or becomes more severe, other common symptoms that may occur include:
- Fatigue
- Eye inflammation (uveitis)
- Fever
- Growth problems
It's important to note that not all individuals with polyarticular JIA will experience all of these symptoms. Additionally, some symptoms, like eye inflammation, require immediate treatment to prevent vision loss. Regular eye exams are recommended for children with JIA to monitor for any eye-related complications. If you or your child have been diagnosed with polyarticular JIA or suspect its presence, it is crucial to consult with a healthcare professional for an accurate diagnosis and appropriate management plan.
Diagnosing polyarticular juvenile idiopathic arthritis may involve excluding (“ruling out”) other conditions that may cause similar symptoms. To help diagnose JIA, the following examinations, tests, and procedures are commonly performed:
- Medical History: Your healthcare provider will discuss your child's symptoms and your family's medical history.
- Physical Exam: The healthcare provider will look for physical signs of JIA, such as pain and swelling of the joints.
- Blood Tests: These tests check for inflammation and the presence of specific antibodies that can indicate JIA.
- Imaging Tests: X-rays, ultrasounds, and MRIs may be helpful in assessing joint damage and inflammation.
Additional examinations, tests, and procedures may include:
- Joint Aspiration: A small amount of fluid is removed from a joint to check for signs of inflammation or infection.
- Eye Examination: JIA can affect the eyes, so an ophthalmologist may perform an eye examination to assess any eye-related complications.
- Functional Assessment: A physical therapist may evaluate your child's mobility and functional abilities to determine the impact of JIA on daily activities.
It's important to follow up with your healthcare provider if your child's symptoms worsen or change after the initial exams. They may recommend further clinical procedures or tests based on the gathered information and results.
The goals of treatment for polyarticular juvenile idiopathic arthritis are to:
- Control inflammation
- Reduce pain and stiffness
- Prevent joint and organ damage
- Improve joint function
- Promote physical and psychosocial growth and development
- Achieve remission (little or no disease activity or symptoms)
- Allow for full engagement with normal activities
To achieve these goals, the following treatments may be recommended:
Medications:
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- Nonsteroidal anti-inflammatory drugs (NSAIDs) can help alleviate pain and swelling from inflammation. There are often the first medications used to treat JIA. NSAIDs are available over-the-counter (without a prescription). Higher dose pills are available by prescription.
- Disease-modifying anti-rheumatic drugs (DMARDs) suppress the immune system to prevent disease progression and joint damage. An example of a DMARD is methotrexate.
- Biologic response modifiers may be prescribed to help reduce inflammation and prevent joint damage. There are several types of biologic response modifiers that work on specific parts of the immune system involved with JIA.
- Corticosteroids: Pills such as prednisone may be used short term to help treat inflammation. For children with JIA, they are often used only until other medications begin to have effect. In some cases, corticosteroids may be given as a shot into a joint.
Therapies:
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- Physical therapy can relieve pain, improve joint movement, strengthen muscles, and prevent injuries during physical activities.
- Occupational therapy can teach individuals how to perform daily tasks with reduced pain and improved joint function.
Self-care and health behavior changes:
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- A balanced diet and regular exercise can support overall health and help manage symptoms.
It's important to note that specific treatment plans for polyarticular JIA may vary depending on factors such as disease severity and individual patient needs. Consult a healthcare professional for personalized advice.
Medication dosing may be affected by many factors. Check with your healthcare professional about dosing for your individual situation. Side effects can occur. Check with your healthcare professional or read the information provided with your medication for side effect information.