Namba Jiro, Tsujimoto Takashi, Temporin Ko, Yamamoto Koji
Department of Orthopaedic Surgery, Toyonaka Municipal Hospital, 4-14-1, Shibahara, Toyonaka, Osaka 560-8565, Japan.
Emerg Radiol. 2011 Dec;18(6):507-11. doi: 10.1007/s10140-011-0985-0. Epub 2011 Sep 21.
Medial condyle fractures of the humerus are rare in any age group. We report a unique case of a humeral medial condyle fracture in a 15-year-old boy with posttraumatic fishtail deformity. The fracture line extended up from the top of the sharp trochlear wedge to the incomplete medial supracondylar cortical aperture. The appearance of the upward displacement and computed tomography imaging with three-dimensional reconstruction at the two different elbow positions suggested that an edge of the semilunar notch of the olecranon acted as a wedge to break and split the trochlea directly. This is the first visualized case of a wedge type injury and may provide evidence that humeral medial condyle fractures can be produced by the wedge force besides the valgus avulsion one.
肱骨内侧髁骨折在任何年龄组都很罕见。我们报告了一例独特的病例，一名15岁男孩发生肱骨内侧髁骨折，伴有创伤后鱼尾状畸形。骨折线从锐利的滑车楔形顶部向上延伸至内侧髁上皮质孔不完全处。在两个不同肘部位置的向上移位外观及三维重建的计算机断层扫描成像表明，鹰嘴半月形切迹的边缘起到了楔子的作用，直接折断并劈开滑车。这是楔型损伤的首例可视化病例，可能为肱骨内侧髁骨折除外翻撕脱骨折外可由楔力导致提供证据。
