Cortical bone trajectory screws fixation in lumbar adjacent segment disease: A technique note with case series.

•Subsequent surgery for lumbar adjacent disease carries lots of side effects.•Application of cortical bone trajectory fixation eliminates most disadvantages.•This could be achieved under C-arm guided without navigation.•Patients in our series appeared favorable outcome within at least 12 months.•This method may be an option for spine surgeons encounter similar situation.