[Treating undifferentiated arthritis. What, when, how and how long?]

Area of Science:

• Rheumatology and Immunology
• Clinical Diagnostics

Context:

• Early arthritis clinics improve patient access.
• Many early arthritis patients present with undifferentiated arthritis (UA), not meeting traditional classification criteria.
• Distinguishing self-limiting UA from persistent/erosive disease is crucial for timely intervention.

Purpose:

• To highlight the diagnostic challenge in early undifferentiated arthritis.
• To emphasize the need for predictive models in UA management.
• To underscore the importance of early treatment for patients with UA.

Summary:

• Patients attending early arthritis clinics often have undifferentiated arthritis (UA).
• Traditional American College of Rheumatology (ACR) criteria are insufficient for diagnosing these patients.
• Predictive models integrating serologic markers and clinical features are essential for identifying UA patients who require disease-modifying antirheumatic drug (DMARD) therapy.

Impact:

• Facilitates earlier and more accurate treatment decisions for patients with undifferentiated arthritis.
• Supports the timely initiation of disease-modifying antirheumatic drugs (DMARDs) in at-risk patients.
• Improves patient outcomes by differentiating between self-limiting and persistent/erosive arthritic conditions.