AP (image 1) and lateral (image 2) radiographs of the knee i | Figure 1

CincyKidsRad

Cincinnati Children's Radiology

AP (image 1) and lateral (image 2) radiographs of the knee in a child with sudden pain after jumping on the trampoline with a parent show a nondisplaced transverse fracture of the proximal tibia. This type of fracture is the most common fracture associated with trampolines. It is caused by tandem jumping. When a heavier jumper bounces up, the trampoline recoils. If the smaller child is coming down at the time when the trampoline recoils, the force of the recoil causes considerable axial loading on the tibia and causes a fracture. This mechanism is highlighted in a classic article by Boyer, et al. #MSKMonday #MusculoskeletalMonday

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