ACR Appropriateness Criteria® Osteonecrosis: 2022 Update.

Area of Science:

• Orthopedics
• Radiology
• Pathology

Background:

• Osteonecrosis, also known as avascular or aseptic necrosis, is bone death due to insufficient blood supply.
• It commonly affects adults aged 30-50 and impacts sites like the femoral head, humeral head, and talus.
• Numerous risk factors contribute, including trauma, corticosteroid use, alcohol, HIV, and certain diseases.

Framework:

• The American College of Radiology (ACR) Appropriateness Criteria provide evidence-based guidelines for medical imaging in specific clinical conditions.
• These guidelines are developed and revised annually by a multidisciplinary expert panel, utilizing systematic analysis of peer-reviewed literature.
• Methodologies like Grading of Recommendations Assessment, Development, and Evaluation (GRADE) and the RAND/UCLA Appropriateness Method inform the guideline development process.

Implementation:

• Early diagnosis of osteonecrosis is crucial for differentiating it from other causes of pain and for implementing timely surgical interventions.
• Imaging plays a vital role in the early detection of osteonecrosis, aiding in preoperative planning and potentially preventing joint collapse.
• In cases with limited or equivocal literature, expert opinion serves as a primary source for formulating recommendations within the ACR Appropriateness Criteria.

Implications:

• Accurate and timely diagnosis of osteonecrosis through appropriate imaging can prevent severe complications such as subchondral fracture and secondary osteoarthritis.
• Effective management strategies guided by evidence-based criteria can help avoid joint replacement surgeries.
• The ACR Appropriateness Criteria facilitate standardized, evidence-based approaches to imaging for osteonecrosis, improving patient outcomes and optimizing resource utilization.