Guerra J, Garfin S R, Resnick D
Radiology. 1984 Dec;153(3):769-72. doi: 10.1148/radiology.153.3.6494475.
Ten cases of retropulsed thoracolumbar vertebral body fragments that had been documented by CT were reviewed to define and characterize the nature, appearance, and position of the retropulsed fragment. All of the retropulsed fragments arose from the superior aspect of the vertebral body. Five of ten patients had a vertical fracture within the retropulsed fragment. Three of ten fragments had anteriorly rotated 90 degrees +/- 60 degrees, so that the cartilaginous end plate faced anteriorly; also, they had migrated 3-8 mm in a craniad or caudad direction. Six of ten patients had an associated vertical or Y-shaped fracture originating from the region of the basivertebral foramen and passing into the inferior one-half of the vertebral body. The presence of a retropulsed fragment is nearly pathognomonic of an axial compression injury. Characteristics of this lesion that may hinder surgical reduction are the intra-fragment fracture, rotation, and craniocaudad movement.
回顾10例经CT记录的胸腰椎椎体后移骨折块，以明确并描述后移骨折块的性质、外观及位置。所有后移骨折块均起自椎体上缘。10例患者中有5例后移骨折块内存在垂直骨折。10个骨折块中有3个向前旋转90度±60度，致使软骨终板朝前；并且，它们在头侧或尾侧方向移位了3 - 8毫米。10例患者中有6例伴有起自椎基孔区域并延伸至椎体下半部的垂直或Y形骨折。后移骨折块的存在几乎是轴向压缩损伤的特征性表现。该损伤可能阻碍手术复位的特征包括骨折块内骨折、旋转及头尾向移位。
