Clinical Report: Case Study and Clinical Review of Rice Body Synovitis in the Shoulder Joint
Background
Rice body synovitis is a rare subtype of synovitis often associated with chronic inflammatory diseases such as rheumatoid arthritis. Its non-specific clinical manifestations can lead to misdiagnosis, making awareness and accurate diagnosis essential for effective management. MRI is particularly valuable for diagnosing this condition due to its ability to visualize characteristic findings.
Data Highlights
Parameter
Value
Rheumatoid Factor
128.0 IU/mL
Anti-CCP Antibody
86.0 RU/mL
Erythrocyte Sedimentation Rate
62.25 mm/h
C-Reactive Protein
15 mg/L
Rice Body Size
0.5–0.8 cm
Key Findings
The patient had a 25-year history of rheumatoid arthritis.
Laboratory tests indicated active rheumatoid arthritis with elevated inflammatory markers.
MRI revealed characteristic rice body-like nodules and the 'floating lotus sign.'
Postoperative pathology confirmed the diagnosis of rice body synovitis.
At 6-month follow-up, the patient had no recurrence and regained full shoulder mobility.
Clinical Implications
Clinicians should consider rice body synovitis in patients with chronic inflammatory arthritis presenting with shoulder swelling and characteristic MRI findings. Early diagnosis and appropriate management, including arthroscopy, can lead to favorable outcomes.
Conclusion
This case highlights the importance of recognizing rheumatoid arthritis-associated rice body synovitis and the role of arthroscopy in its management. Continued follow-up and optimization of RA treatment are necessary to prevent recurrence.
The agency outlined early regulatory actions supporting nonanimal methods, including draft guidance, artificial intelligence tools, and expanded use of human-relevant data models.
