Burst fracture. (A) Lateral lumbar radiograph shows anterior loss of height and the L1 level with retropulsion off bony fragment into the spinal canal.

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Burst fracture. (A) Lateral lumbar radiograph shows anterior loss of height and the L1 level with retropulsion off bony fragment into the spinal canal (arrow). There is a mild kyphosis at this level. (B) Frontal radiograph of lumbar spine shows asymmetric narrowing of the right side of the vertebra (arrow) with mild expansion of the transverse diameter of this vertebra relative to other lumbar levels (arrowhead). Note widening of interpediculate distance at this level (double arrow). (C) Sagittal CT reformat of the lumbar spine reveals comminuted fracture in L1 vertebra as well as retropulsion of bone fragment into the spinal canal (arrow). (D) Axial CT image of L1 vertebral body shows retropulsed bone fragment compromising width of the spinal canal by approximately 50% (arrowheads). Note widening of the interpediculate distance (arrowheads). Source: Axial Skeletal Trauma, Basic Musculoskeletal Imaging Citation: Tehranzadeh J, MD. Basic Musculoskeletal Imaging; 2016 Available at: http://accessphysiotherapy.mhmedical.com/DownloadImage.aspx?image=/data/books/1788/ch4fg17b.png&sec=123932742&BookID=1788&ChapterSecID=123771163&imagename= Accessed: December 28, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved