Figure 3From: Unilateral instrumented fixation for cervical dumbbell tumorsUnilateral lateral mass screw fixation (patient number 11). (a) Plain radiography of the cervical spine of a 54-year-old man showed a positive pedicle sign at the left C5. (b) Plain radiography showed C4 spondylolisthesis (2-mm increase in vertebral slip) which was evident at the last follow-up.Back to article page