Spinal dural mater was cut open through paramedian line to expose the tumor, which was covered by arachnoid.

Summary of Background Data. Compared with conventional open PLIF, mini-open PLIF using a paramedian approach reduces intraoperative hemorrhage and decreases postoperative back pain.

Conclusions pontine infarctions, which mainly located in mid-upper paramedian pons, are usually due to vertebrobasilar artery stenosis and occlusion of pontine perforating arteries by hypertension.