Lesson of the month
Apparent hip osteoarthritis in a 16 year old girl
a Departments of Rheumatology , b and Orthopaedic Surgery , c Hôpital Henri Mondor,
Créteil, France
Correspondence to: Dr P Claudepierre, Service de Rhumatologie, Hôpital Henri Mondor, 51 Avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France.
Accepted for publication 18 March 1997
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Case report |
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A 16 year old girl developed insidious left groin pain after an 18 month period of limping before being seen in the department of
rheumatology. No other complaint or remarkable history was noted. Pain
was relieved by bed rest but was worse at night in particular after
sport practice at school. Non-steroidal anti-inflammatory drugs
(diclofenac, 75 to 100 mg/day) and analgesics (paracetamol, 2 to 3 g/day) were both effective. Physical examination revealed only
decreased internal rotation of the left hip joint (5°) and atrophy of
the left thigh (a 2 cm decrease in the circumference). Initial pelvic
x rays performed nine months after onset were normal. Technetium-99m bone scan performed six months after initial
x rays showed diffuse increased uptake over the hip
including the femoral head, femoral neck, and acetabulum (fig 1A).
Magnetic resonance imaging (MRI) showed decreased bone marrow signal
intensity on T1 weighted images and increased signal intensity on T2
weighted images in
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