Entrapment of the flexor digitorum profundus (FDP) tendon following radius and ulna midshaft paediatric forearm fractures has been reported rarely in the literature. To date, 19 cases have been described. A characteristic fracture pattern, persistent cortical defect at the fracture site and flexion contracture not responsive to hand therapy are all hallmarks of the condition. We present a case along with a review of the literature. A 12-year-old boy underwent exploration of a primary right open radius and ulna fracture site 22 months following initial open reduction and titanium elastic nail system (TENS) fixation. The little finger FDP tendon was found interposed between the ulna bone with a significant defect in the cortical surface of the ulna, correlating with a lucency identified on plain radiograph preoperatively. Removal of all interposed tissue, debridement of the bone edges and Pulvertaft tendon weave of the FDP of the little finger to the ring finger were performed. The patient recovered full upper limb function. Clinicians should be vigilant to identify this complication when managing patients with forearm fractures. A thorough clinical examination pre– and post–open or closed forearm fracture reduction should be performed to ensure early recognition of this rare complication. If the tenodesis effect and post-operative adhesions cannot be adequately released by therapy, interposition of the tendon at the fracture site should be considered as a differential diagnosis. If the complication is suspected, early operative intervention should be performed to ensure optimal fracture healing and restoration of function.

中文翻译：

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屈肌腱截留模仿小儿中轴前臂骨折的腱鞘效应：一例病例并文献复习

在radius骨和尺骨中轴小儿前臂骨折之后，屈指深屈肌腱（FDP）肌腱卡住的报道很少见。迄今为止，已经描述了19个案例。该病的特征是特征性的骨折类型，骨折部位持续存在的皮质缺损以及对手部疗法无反应的屈曲挛缩。我们提出一个案例以及对文献的回顾。初次切开复位钛弹性钉系统（TENS）固定后22个月，一名12岁男孩接受了一次原发性右上radius骨和尺骨骨折部位的探查。发现小指FDP肌腱插入尺骨之间，在尺骨皮质表面有明显缺陷，与术前在平片上确定的透明性相关。进行所有插入组织的清除，骨头边缘的清创术以及小指FDP到无名指的Pulvertaft腱编织。患者恢复了上肢的全部功能。在处理前臂骨折患者时，临床医生应保持警惕，以确认这种并发症。应在开放或封闭前臂骨折的前后进行彻底的临床检查，以确保及早发现这种罕见并发症。如果通过治疗不能充分释放腱固定作用和术后粘连，则应考虑在骨折部位插入肌腱作为鉴别诊断。如果怀疑并发症发生，应尽早进行手术干预，以确保最佳的骨折愈合和功能恢复。进行了小骨FDP的骨边缘清创术和无名指的掌腱编织。患者恢复了上肢的全部功能。在处理前臂骨折患者时，临床医生应保持警惕，以确认这种并发症。应在开放或封闭前臂骨折的前后进行彻底的临床检查，以确保及早发现这种罕见并发症。如果通过治疗不能充分释放腱固定作用和术后粘连，则应考虑在骨折部位插入肌腱作为鉴别诊断。如果怀疑并发症发生，应尽早进行手术干预，以确保最佳的骨折愈合和功能恢复。进行了小骨FDP的骨边缘清创术和无名指的掌腱编织。患者恢复了上肢的全部功能。在处理前臂骨折患者时，临床医生应保持警惕，以确认这种并发症。应在开放或封闭前臂骨折的前后进行彻底的临床检查，以确保及早发现这种罕见并发症。如果通过治疗不能充分释放腱固定作用和术后粘连，则应考虑在骨折部位插入肌腱作为鉴别诊断。如果怀疑并发症发生，应尽早进行手术干预，以确保最佳的骨折愈合和功能恢复。