Unilateral versus bilateral pedicle screw fixation with transforaminal lumbar interbody fusion for treatment of lumbar foraminal stenosis

•Transforaminal lumbar interbody fusion (TLIF) is an appropriate procedure for lumbar foraminal stenosis treatment.•Unilateral pedicle screw fixation achieves satisfactory stability and fusion rates.•Unilateral approach does not increase complication rates.•Unilateral approach is associated with shorter operative time and less blood loss.