Conclusion It is fundamental in image analysis to distinguish avulsion fracture from physiological small osteoepiphyte, sesamoid bone, and aberrant accessory bone.

• 结论正确掌握撕脱性骨折、生理性小骨骺、籽骨及解剖变异的副骨的特点，并综合运用影像学资料是鉴别撕脱性骨折的基本要素。