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Abstract #1548

T2 -mapping and dGEMRIC of the patellar cartilage - long term follow-up after patellar stabilizing surgery in childhood

Eva Bengtsson Moström1, Eveliina Lammentausta2, Thröstur Finnbogason3, Lars Weidenhielm4,5, Per-Mats Janarv1,5, and Carl Johan Tiderius6

1Department of Women´s and Children´s Health, Karolinska Institutet, Stockholm, Sweden, 2Department of Diagnostic Radiology, Oulu University Hospital, Finland, 3Department of Paediatric Radiology, Karolinska University Hospital, Sweden, 4Department of Molecular Medicine and Surgery, Karolinska Institutet, Sweden, 5Stockholm Sports Trauma Research Center, Karolinska Institutet, Sweden, 6Department of Orthopedics, Lund University, Sweden

Recurrent patellar dislocation in childhood often require surgical stabilization, but the effects on cartilage quality after surgery is unknown. 17 patients were examined with T2 and dGEMRIC ≥5 years after surgery. dGEMRIC was shorter centrally, whereas T2 was longer most medially in the patellar cartilage of the operated patella (p<0.05). The short dGEMRIC indicates loss of glycosaminoglycans in the patella of the operated knee. Longer T2 may be an early sign of joint pathology. These findings may indicate an imbalance in the synthesis of matrix molecules, a sign of early cartilage degeneration.

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