For Patients & General Readers
Rheumatoid arthritis (RA) is a chronic autoimmune disease where your body's immune system mistakenly attacks its own healthy tissues, primarily the lining of your joints. This leads to inflammation, pain, swelling, and stiffness, most commonly affecting the hands, wrists, and feet. If left untreated, RA can cause joint damage and disability, impacting your ability to perform daily activities.
Clinical Overview
Rheumatoid arthritis (RA) is a systemic autoimmune inflammatory disease characterized by chronic synovitis, leading to progressive joint destruction and extra-articular manifestations. Pathogenesis involves complex interactions of genetic predisposition, environmental triggers, and immune dysregulation, primarily mediated by T cells, B cells, and pro-inflammatory cytokines.
Clinical Presentation
- Symmetrical polyarthritis, typically affecting small joints of the hands and feet (MCPs, PIPs, MTPs).
- Morning stiffness lasting longer than 30-60 minutes.
- Joint swelling, warmth, and tenderness.
- Rheumatoid nodules (subcutaneous firm nodules, often over pressure points).
- Systemic symptoms including fatigue, malaise, low-grade fever, and weight loss.
- Extra-articular manifestations (e.g., ocular, pulmonary, cardiovascular, hematologic).
Signs & Symptoms
Symptoms (Patient-Reported)
- Joint pain and tenderness, especially in the morning or after inactivity.
- Swollen, warm, and boggy joints.
- Stiffness that is worse in the morning and improves with activity.
- Fatigue and lack of energy.
- Loss of appetite and unintentional weight loss.
- Numbness or tingling in the hands and feet.
- Dry eyes and mouth.
Signs (Clinician-Observed)
- Synovial hypertrophy and effusion.
- Ulnar deviation of the fingers (in advanced disease).
- Subcutaneous rheumatoid nodules.
- Reduced range of motion in affected joints.
- Warmth and erythema over affected joints.
Differential Diagnoses
| Condition | Distinguishing Feature |
|---|
| Osteoarthritis | Typically affects weight-bearing joints and DIPs, less morning stiffness, pain improves with rest, no systemic symptoms. |
| Psoriatic Arthritis | Associated with psoriasis, can affect DIPs, axial skeleton, and have dactylitis (sausage digits). |
| Systemic Lupus Erythematosus (SLE) | Multisystemic disease with characteristic rash, photosensitivity, serositis, and renal involvement; arthritis is often migratory and non-erosive. |
| Reactive Arthritis | Arises after an infection (GU or GI), often asymmetric, can involve enthesitis and eye inflammation (conjunctivitis). |
| Gout/Pseudogout | Acute, severe, episodic attacks of inflammation, often monoarticular, associated with hyperuricemia (gout) or calcium pyrophosphate deposition (pseudogout). |
| Viral Arthritis | Acute onset, often self-limiting, may be associated with a viral prodrome. |
Red Flags — Seek Immediate Care
- Rapidly progressive joint destruction on imaging.
- Evidence of significant extra-articular involvement (e.g., pulmonary fibrosis, vasculitis).
- Development of Felty's syndrome (splenomegaly, neutropenia).
- Signs of cardiac involvement (e.g., pericarditis, valvulitis).
Key Investigations
- Erythrocyte Sedimentation Rate (ESR) and C-reactive protein (CRP) - inflammatory markers.
- Rheumatoid Factor (RF) - autoantibody, present in ~70-80% of RA patients.
- Anti-cyclic citrullinated peptide (anti-CCP) antibodies - highly specific for RA.
- Complete Blood Count (CBC) - may show anemia of chronic disease or leukopenia.
- Joint X-rays - to assess for erosions, joint space narrowing, and deformities (may be normal early on).
- Joint Ultrasound or MRI - can detect synovitis and early erosions.
Management Overview
Management of RA is multifaceted, aiming to achieve remission or low disease activity, prevent joint damage, and improve quality of life. This involves early initiation of disease-modifying antirheumatic drugs (DMARDs), including synthetic DMARDs (e.g., methotrexate) and biologic DMARDs (e.g., TNF inhibitors, IL-6 inhibitors), often in combination with non-steroidal anti-inflammatory drugs (NSAIDs) and corticosteroids for symptom control.
Disclaimer: This article is for educational purposes only and does not constitute medical advice.
Always consult a qualified healthcare professional for diagnosis and treatment.
TruelyserMD does not replace clinical judgement.