The brain, cervical, and thoracic spine (not shown), as well as the lumbar spine, are unremarkable, with no further areas of abnormal enhancement.
Enhancement is closely related to the right S1 nerve root slightly smaller than before. It does not appear intrinsic to the nerve root but rather appears to relate to a disc extrusion through a right posterolateral L5/S1 annular defect.
Conclusion:
Enhancement related to the right S1 nerve root in the subarticular recess at L5/S1 is similar to before, but likely granulation tissue surrounding and a disc extrusion from the right L5/S1 disc rather than a tumour.