: The aim of this study was to retrospectively evaluate the clinical, functional, and radiographic outcomes of displaced C-shaped intercondylar fractures of the humerus in children and adolescents, and evaluate upper-extremity function with the short version of the Disabilities of the Arm, Shoulder and Hand outcome questionnaire (Quick DASH). We retrospectively reviewed the data of nine children with displaced C-intercondylar fractures that were treated surgically. Age, sex, laterality, mechanism of injury, amount of displacement, type of treatment, fixation method, and outcome were recorded. The outcome of C-shaped fractures was compared with that of T-intercondylar fractures published by the same surgeons in a previous study. A total of nine consecutive patients (median age, 12 years; range, 9-14 years) with displaced C-intercondylar fractures of the humerus (3 females) were included; in six cases (67%), the left side was affected. Median follow-up was 2 years (range, 2-6). All patients underwent open reduction and internal fixation by screws (n = 5), Kirschner-wires (n = 3), or both (n = 1). Overall, four out of nine patients developed a total of five complications (55.5%): one case of secondary displacement, one case of fishtail deformity, two cases extension deficit, and one case of limited flexion/extension requiring release. The median Quick DASH score at last follow-up visit was 0 (range, 0-4.5). C-intercondylar fractures should be added as a class to complete the Tnoniolo and Wilkin's classification. The prognosis is similar to that of T-intercondylar fractures because, in both cases, fractures are intra-articular and require open reduction and internal fixation.
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