I had a TLIF spinal fusion in Feb of L4-s1 and have continued to have pain. Just recently I have started to have sciatic pain again as well as just general pain in my lower back. I received my CT scan result back that show a bulging disc at L4 plus foraminal narrowing at L5-S1. My MRI results came back as follows:

Right larger than left extra axial multioculated cystic lesions within the spinal canal. There is minimal posterior mass effect on the thecal sac. There is left greater than right stenosis secondary to persitent low grade anterolisthesis of L5 on S1.

Persistent neruoformainal stonosis at L5-S1.
Extra axial cystic lesions anteriorly within the spinal canal most like seroma.

Anyone have an ideas if this could be causing my pain? Is unusual that L5 is slipping again after having a fusion only months ago? Is it unusual to have foraminal narrowing again after such a short time after surgery?