Clinical and MRI Outcomes After Surgical Treatment of Osteochondral Lesions of the Talus in Skeletally Immature Children

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Background:The literature on the osteochondral lesion of the talus (OLT) in skeletally immature children is scarce and little is known about the clinical outcomes and the radiologic appearance of these lesions after surgical treatment. The aim of this study was to assess mid-term clinical and magnetic resonance imaging (MRI) outcomes after arthroscopic microfracture (AM) of OLT in skeletally immature children.Methods:Thirteen patients with OLT treated by AM before skeletal maturity were included in the study. The Berndt and Harty outcome question, the Single Assessment Numeric Evaluation question, and the Martin questionnaire were used to obtain patients’ subjective satisfaction with their operated ankle. Functional outcomes preoperatively and postoperatively were evaluated using the American Orthopaedic Foot and Ankle Society (AOFAS) score. MRI scans were performed postoperatively using a magnetic resonance observation of cartilage repair tissue (MOCART) scoring system for 11 ankles.Results:The median age was 15 years (range, 13 to 16 y) and the median follow-up period was 5.6 years (range, 3.8 to 13.6 y). According to the Berndt and Harty outcome question, good clinical results were reported in 10 (76.9%) and fair in 3 (23.1%) patients. The postoperative AOFAS score was significantly improved when compared with the preoperative AOFAS score, with a mean increase of 35 points (P<0.001). The overall MOCART score was 65 (range, 10 to 75). MRI variables of the MOCART scoring system showed no association with clinical outcomes.Conclusions:AM seems to be an effective surgical method for the treatment of OLT in skeletally immature children.Level of Evidence:Level IV—therapeutic studies, case series.

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