60 year-old male status post lumbar spine fusion. Two views of the lumbar spine demonstrate posterior rods with screws entering the L3 through S1 vertebrae. We see no hardware complications. There are spacer devices at L3-L4, L4-L5, and L5-S1 and bone grafts at L3-L4 and L4-L5. Grade 1 retrolisthesis of L4 relative to L5. Gas within the posterior soft tissues presumably reflects recent surgery.
Postoperative changes of a lumbar spine fusion as described above.