 There are postoperative findings related to right-sided L4-L5 microdiscectomy. There is persistent enhancement and effusion with a subcentimeter synovial cyst associated with the left L4-L5 facet joint. There is also enhancement along the right aspect of the L4-L5 intervertebral disc. There is a diffuse disc bulge at L4-5, with superimposed right foraminal component and associated facet arthropathy resulting in moderate bilateral neural foraminal stenosis at L4-L5 level and posterior epidural lipomatosis with mild-to-moderate spinal canal stenosis. There is a disc bulge at L5-S1, resulting in bilateral moderate neural foraminal stenosis. The vertebral body heights are preserved. There is endplate degenerative changes and Schmorl's node in the inferior endplate of L5 vertebra. The vertebral bone marrow signal is otherwise unremarkable. There is loss of disc height at L5-S1 and mild loss of disc height at L1-L2 and L4-L5 level. There is no abnormal signal within the imaged portion of the spinal cord. There is an unchanged perineural cyst in the sacral spinal canal.
1. Postoperative findings related to right L4-L5 microdiscectomy with residual eccentric right disc protrusion and what appears to be associated scar versus granulation tissue.2. Persistent enhancement and effusion associated with a subcentimeter synovial cyst involving the left L4-L5 facet joint may represent synovitis.3. Degenerative spondylosis at L5-S1 with bilateral moderate neural foraminal stenosis.