Imaging Scoring Methods in Axial Spondyloarthritis

Area of Science:

• Radiology and Rheumatology
• Medical Imaging in Inflammatory Diseases

Background:

• Axial spondyloarthritis (AxSpA) is characterized by inflammatory and chronic structural changes.
• These changes are key objective signs for diagnosis and monitoring.

Purpose of the Study:

• To describe the imaging manifestations of inflammation and structural changes in the sacroiliac joints and spine in axial spondyloarthritis.
• To highlight the role of medical imaging in identifying key features of AxSpA.

Main Methods:

• Review of imaging findings in patients with axial spondyloarthritis.
• Description of characteristic inflammatory signs (bone marrow edema) and chronic structural changes (erosions, sclerosis, ankylosis, fat metaplasia, syndesmophytes) on imaging.

Main Results:

• Inflammation in sacroiliac joints (sacroiliitis) appears as bone marrow edema.
• Chronic changes in sacroiliac joints include fat metaplasia, erosions, sclerosis, and ankylosis.
• Spinal inflammation (spondylitis) involves bone marrow edema in vertebral bodies, facet, and costovertebral joints; structural changes include fat metaplasia, sclerosis, syndesmophytes, and ankylosis.

Conclusions:

• Objective imaging signs, including bone marrow edema and chronic structural changes, are crucial for diagnosing axial spondyloarthritis.
• Detailed characterization of these findings aids in understanding disease progression and activity in the sacroiliac joints and spine.