Intra-Articular Osteoid Osteoma Mimicking Juvenile Arthritis

Figure 1

14-year-old girl with intra-articular osteoid osteoma of the right femoral neck. (a) Frontal X-ray of the pelvis, interpreted as normal. (b) Bone scan, demonstrating increased uptake of the right hip joint. (c) Hip ultrasound, longitudinal scan, showing synovial thickening of the anterior articular recess, right hip.

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