Rheumatoid arthritis

Definition

Rheumatoid arthritis (RA) is a long-term disease that causes inflammation of the joints and surrounding tissues. It can also affect other organs.

Alternative Names

RA; Arthritis - rheumatoid

Causes

The cause of RA is unknown. It is considered an autoimmune disease. The body's immune system normally fights off foreign substances, like viruses. But in an autoimmune disease, the immune system confuses healthy tissue for foreign substances. As a result, the body attacks itself.

RA can occur at any age. Women are affected more often than men.

RA usually affects joints on both sides of the body equally. Wrists, fingers, knees, feet, and ankles are the most commonly affected. The course and the severity of the illness can vary considerably. Infection, genes, and hormones may contribute to the disease.

Symptoms

The disease usually begins gradually with:

• Fatigue
• Loss of appetite
• Morning stiffness (lasting more than 1 hour)
• Widespread muscle achesWeakness

Eventually, joint pain appears. When the joint is not used for a while, it can become warm, tender, and stiff. When the lining of the joint becomes inflamed, it gives off more fluid and the joint becomes swollen. Joint pain is often felt on both sides of the body, and may effect the fingers, wrists, elbows, shoulders, hips, knees, ankles, toes and neck.

Additional symptoms include:

• Anemia due to failure of the bone marrow to produce enough new red cells
• Eye burning, itching, and discharge
• Hand and feet deformities
• Limited range of motion
• Low-grade fever
• Lung inflammation (pleurisy)
• Nodules under the skin (usually a sign of more severe disease)
• Numbness or tingling
• Paleness
• Skin redness or inflammation
• Swollen glands

Joint destruction may occur within 1-2 years after the appearance of the disease.

Exams and Tests

A specific blood test is available for diagnosing RA and distinguishing it from other types of arthritis. It is called the anti-CCP antibody test. Other tests that may be done include:

• Complete blood count
• C-reactive protein
• Erythrocyte sedimentation rate
• Joint ultrasound or MRI
• Joint x-rays
• Rheumatoid factor test (positive in about 75% of people with symptoms)
• Synovial fluid analysis

Treatment

RA usually requires lifelong treatment, including medications, physical therapy, exercise, education, and possibly surgery. Early, aggressive treatment for RA can delay joint destruction.

MEDICATIONS

Disease modifying antirheumatic drugs (DMARDs): These drugs are the current standard of care for RA, in addition to rest, strengthening exercises, and anti-inflammatory drugs. Methotrexate (Rheumatrex) is the most commonly used DMARD for rheumatoid arthritis. Leflunomide (Arava) may be substituted for methotrexate. These drugs are associated with toxic side effects, so you will need frequent blood tests when taking them.

Anti-inflammatory medications: These include aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen. Although NSAIDs work well, long-term use can cause stomach problems, such as ulcers and bleeding, and possible heart problems. NSAID packaging now carries a warning label to alert users of an increased risk for cardiovascular events (such as heart attack or stroke) and gastrointestinal bleeding.

Antimalarial medications: This group of medicines includes hydroxychloroquine (Plaquenil) and sulfasalazine (Azulfidine), and is usually used in combination with methotrexate. It may be weeks or months before you see any benefit from these medications.

Corticosteroids: These medications work very well to reduce swelling and inflammation in a joint. Because of potential long-term side effects, however, corticosteroids should be taken only for a short time and in low doses when possible.

Cyclooxygenase-2 (COX-2) inhibitors: These drugs block an inflammation-promoting enzyme called COX-2. This class of drugs was initially believed to work as well as traditional NSAIDs, but with fewer stomach problems. However, numerous reports of heart attacks and stroke have prompted the FDA to re-evaluate the risks and benefits of the COX-2s. Celecoxib (Celebrex) is still available, but labeled with strong warnings and a recommendation that it be prescribed at the lowest possible dose for the shortest possible duration. Talk to your doctor about whether COX-2s are right for you.