ACR Appropriateness Criteria® Chronic Knee Pain: Update 2026

The authors aim to update the American College of Radiology Appropriateness Criteria for evaluating chronic knee pain, which is a common issue in adults often linked to osteoarthritis and other conditions. They emphasize the importance of imaging, particularly radiographs, in diagnosing the underlying causes of knee pain, and outline specific scenarios where additional imaging may be necessary. The document serves as a guideline for clinicians to ensure appropriate imaging practices based on current evidence and expert consensus.