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.

本研究的目的是回顾性评估儿童和青少年肱骨 C 型髁间骨折移位的临床、功能和影像学结果，并使用简短版本的《手臂、肩部残疾》评估上肢功能和手部结果调查问卷（Quick DASH）。我们回顾性分析了 9 名接受手术治疗的移位 C 型髁间骨折儿童的数据。记录年龄、性别、偏侧性、损伤机制、移位量、治疗类型、固定方法和结果。将 C 形骨折的结果与同一外科医生在之前的研究中发表的T 形髁间骨折的结果进行了比较。总共包括 9 名连续的肱骨 C 型髁间骨折移位患者（中位年龄 12 岁；范围 9-14 岁）（3 名女性）；在六例（67%）中，左侧受到影响。中位随访时间为 2 年（范围 2-6）。所有患者均接受切开复位螺钉内固定（n = 5）、克氏针内固定（n = 3）或两者同时使用（n = 1）。总体而言，九名患者中有四名出现了总共五种并发症（55.5%）：1 例继发性移位、1 例鱼尾畸形、2 例伸展缺陷和 1 例需要松解的屈曲/伸展受限。最后一次随访时的 Quick DASH 评分中位数为 0（范围 0-4.5）。应将 C 髁间骨折添加为一个类别，以完成 Tnoniolo 和 Wilkin 的分类。预后与T 型髁间骨折相似，因为这两种情况都是关节内骨折，需要切开复位内固定。