Abstract
We present three cases of fracture of the proximal tibia in young children who were jumping on a trampoline. The typical radiological findings and the underlying mechanism of trauma are discussed. The key radiological features are: a transverse hairline fracture of the upper tibia often accompanied by a buckle fracture of the lateral or medial tibial cortex, buckling of the anterior upper tibial cortex and anterior tilting of the epiphyseal plate. New types of injuries related to specific recreational activities are recognized. It is often helpful to associate a typical injury with a particular activity. Trampoline related injuries have increased dramatically over the last years. The most common lesions are fractures and ligamentous injuries, in particular a transverse fracture of the proximal tibia. However the radiological findings can be very subtle and easily overlooked. It is therefore important to be aware of the typical history and radiological findings.
Highlights
We present three cases of fracture of the proximal tibia in young children who were jumping on a trampoline
Standard radiographs of the left knee (Fig. 2A) were performed and showed a transverse impaction fracture of the upper tibia accompanied by a buckle fracture of the anterior tibial cortex
Standard radiographs of the left leg (Fig. 3A, B) showed a hairline fracture of the upper right tibia and an associated cortical buckle fracture at the anterior portion of the proximal tibia as well as an increased concavity of the notch for the tibial tubercle on the lateral view and slight anterior tilting of the epiphyseal plate
Summary
An 18-month-old boy presented at the emergency unit because he did not want to walk or bear weight on the left leg This occurred after jumping on a trampoline. A 4-year-old boy presented at the emergency unit with a history of jumping on a trampoline, no specific accident happened. He refused to walk or bear weight on the right leg. Standard radiographs of the left leg (Fig. 3A, B) showed a hairline fracture of the upper right tibia and an associated cortical buckle fracture at the anterior portion of the proximal tibia as well as an increased concavity of the notch for the tibial tubercle on the lateral view and slight anterior tilting of the epiphyseal plate. A cortical buckle of the lateral distal femoral metaphysis was present
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