Juvenile idiopathic arthritis

Case contributed by Jeremy Jones
Diagnosis certain


Knee swelling on and off for months. Pain and incomplete extension. Red and hot. No infective symptoms.

Patient Data

Age: 11 years
Gender: Female

Thickened and hyperenhancing synovium with associated joint effusion. Small area of medial femoral condyle bone edema.

Case Discussion

Appearances of juvenile idiopathic arthritis (JIA). Findings in this case are gross and most pediatricians with an interest in rheumatology would make a clinical diagnosis.

This case highlights the importance that contrast administration has - without contrast, it is difficult, if not impossible, to separate the fluid from synovium on the fluid-sensitive, fat-supressed sequences.

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