class="Heading">Background class="Para">Despite the great amount of research concerning bone cysts, there is still no commonly accepted method of treatment. The aim of this study was to evaluate the effectiveness managing bone cyst with hybrid external fixator by distraction osteogenesis. class="Heading">Materials and methods class="Para">Between 1982 and 2009, 25 patients with unicameral (20 patients) and aneurismal (five patients) bone cysts were treated using this method. Eighteen patients had a history of pathological fracture at the same location. Cysts were located in the humerus, femur, tibia, and radius. Median follow-up was 48?(range 31–91)?months. Results were evaluated on plain radiographs according to the classification system of Capanna et al. Functional assessment was done using the modified system recommended by Enneking et al. class="Heading">Results class="Para">In our study group of 25 bone cysts, 15 were classified as completely healed and nine as healed with residual radiolucency. Recurrence was observed in one patient. Absence of response to treatment was not observed. All patients had excellent functional outcomes, except one with recurrence who was rated poor. class="Heading">Conclusions class="Para">As bone cysts are found in long bones in 90–95?% of patients, and taking into account our achieved positive results in almost all patients, we recommend this method of distraction osteogenesis as a treatment option. It is an effective, economical method of treatment, which eliminates deformity and restores bone length, especially in patients with pathologic fractures.
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机译：class =“ Heading”>背景 class =“ Para”>尽管有关骨囊肿的研究很多，但仍然没有普遍接受的治疗方法。这项研究的目的是评估通过牵张成骨术使用混合外固定器治疗骨囊肿的有效性。 class =“ Heading”>材料和方法 class =“ Para”> 1982年之间和2009年，使用这种方法治疗了25例一腔（20例）和动脉瘤（5例）骨囊肿患者。 18名患者在同一位置有病理性骨折史。囊肿位于肱骨，股骨，胫骨和radius骨中。中位随访时间为48个月（31-91个月）。根据Capanna等人的分类系统在平片上评估结果。使用Enneking等人推荐的改良系统进行功能评估。 class =“ Heading”>结果 class =“ Para”>在我们的25个骨囊肿研究组中，有15个归类为已完全治愈，有九个已通过剩余的射线透明性治愈。观察到一名患者复发。没有观察到对治疗的反应。所有患者均具有良好的功能预后，但复发率低的患者除外。 class =“ Heading”>结论 class =“ Para”>因为在长骨中发现了骨囊肿考虑到90-95％的患者，考虑到我们几乎在所有患者中均取得了积极的结果，我们建议采用这种分散成骨的方法作为治疗选择。这是一种有效，经济的治疗方法，可以消除畸形并恢复骨骼长度，特别是对于病理性骨折的患者。
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