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Copyright ©The Author(s) 2016.
World J Orthop. Feb 18, 2016; 7(2): 109-116
Published online Feb 18, 2016. doi: 10.5312/wjo.v7.i2.109
Figure 1
Figure 1 The (absent) pedicle sign known as the winking owl sign (arrow). A reliable sign of osteolytic spinal metastases on antero-posterior radiographs is loss of the normal pedicle contour.