Enthesopathies and enthesitis. Part 2: Imaging studies

Area of Science:

• Rheumatology
• Radiology
• Pathology

Background:

• Enthesopathies, including enthesitis, are pathologies of tendon and ligament attachments.
• Enthesitis is a characteristic sign of spondyloarthritis, a group of rheumatic diseases.
• Current clinical diagnosis relies on non-specific signs and lab tests, with imaging proposed to improve accuracy.

Purpose of the Study:

• To review the current state of imaging examinations in diagnosing enthesitis.
• To evaluate the specificity of imaging criteria for enthesitis.
• To identify the need for more specific imaging features for early spondyloarthritis diagnosis.

Main Methods:

• Review of existing literature on imaging modalities (ultrasound, MRI) for enthesitis diagnosis.
• Analysis of reported imaging criteria for enthesitis.
• Discussion of the limitations of current imaging techniques in differentiating enthesitis.

Main Results:

• No current imaging criteria for enthesitis are specific for inflammation.
• Ultrasound and MRI lack unambiguous features for diagnosing enthesitis.
• Enthesitis can be the sole early symptom of spondyloarthritis, especially in HLA-B27 negative patients.

Conclusions:

• Imaging modalities like ultrasound and MRI have limitations in definitively diagnosing enthesitis.
• The lack of specific imaging signs necessitates the search for other characteristic features of spondyloarthritis.
• Developing more specific imaging criteria is crucial for early diagnosis of spondyloarthritis.