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• Clinical Article •
MRI in abnormal knees of juvenile idiopathic arthritis
WANG Yi  LI Rui  SONG Ying-ru  HUANG Zhong-kui  NONG Guang-min 

DOI:10.3969/j.issn.1674-8034.2012.04.006.


[Abstract] Objective: To evaluate MRI features in abnormal knees of juvenile idiopathic arthritis (JIA).Materials and Methods: Twenty-four patients diagnosed JIA clinically with knees pain and swelling were taken X-ray and MR images of knees. X-ray and MRI features of knees were read respectively. Thicknesses of suprapatellar bursa synovium and suprapatellar pouch fluid volume were measured. Person’s correlations between the suprapatellar bursa synovial thickness, fluid volume and the clinical data were analyzed respectively.Results: All 24 X-ray of knees were found swelling, but no bony erosion. MRI of 24 cases showed the suprapatellar bursa effusion [(13.19±5.44) ml] in all, and accompany cartilage articular surface injury in 4, anterior cruciate ligament injury in 2, popliteal lymph nodes enlargement in 4, bone marrow edema in 5. Suprapatellar bursa synovium thickening [(3.21±1.27) mm], pannus formation were showed and enhanced significantly in all 17 cases of MRI-enhancement. The correlation (r=0.837, P<0.05) were signaficant between synovial thickness and suprapatellar pouch fluid volume. RF was (4.32±2,92) U/ml, ESR was (53.38±19.34) mm/h, CRP was (60.96±45.52) mg/L in all 24 cases. Little correlations (r=0.684, 0.507, P<0.05) were found between suprapatellar bursa synovial thickness and RF, ESR. No correlations (r=0.213, P> 0.05) were found between suprapatellar bursa synovial thickness and CRP. Large correlations (r=0.837, P<0.05) were found between suprapatellar pouch fluid volume and RF. Little correlations (r=0.452,P<0.05) were found between suprapatellar pouch fluid volume and ESR. No correlations (r=0.268, P> 0.05) were found between suprapatellar pouch fluid volume and CRP.Conclusion: MRI could show suprapatellar bursa synovial thickness, suprapatellar bursa effusion, bone marrow edema of JIA, which could provide imaging evidence in diagnosis of early active JIA.
[Keywords] Arthritis, juvenile rheumatoid；Knee joint；Magnetic resonance imaging

WANG Yi Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China

LI Rui Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China

SONG Ying-ru * Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China

HUANG Zhong-kui Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China

NONG Guang-min Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China

*Correspondence to: Song YR, E-mail: syrhqq@163.com

Conflicts of interest   None.

Received  2012-05-02
Accepted  2012-06-05
DOI: 10.3969/j.issn.1674-8034.2012.04.006
DOI:10.3969/j.issn.1674-8034.2012.04.006.

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