Management of recurrent lumbar disc herniation: a comparative analysis of posterior lumbar interbody fusion and repeat discectomy

Background: For Recurrent lumbar disc herniation, many experts suggest a repeat discectomy without stabilization due to its minimal tissue manipulation, lower blood loss, shorter hospital stay, and lower cost, recent research on the role of instability in disc herniation has made fusion techniques popular among spinal surgeons. We compare the postoperative outcomes of posterior lumbar interbody fusion (PLIF) and repeat discectomy for same-level recurrent disc herniation. Methods: The patients included had previously undergone discectomy and presented with a same-level recurrent lumbar disc herniation. The patients were placed into two groups: 1) discectomy only, 2) posterior lumbar interbody fusion based on the absence or presence of segmental instability. Preoperative and postoperative Oswestry disability index scores, duration of surgery, blood loss, duration of hospitalization, and complications were analyzed. Results: The repeat discectomy and fusion groups had 40 and 34 patients respectively. The patients were followed up for 2.68 (1-4) years. There was no difference in the duration of hospitalization (3.73 vs. 3.29 d P 0.581) and operative time (101.25 vs. 108.82mins, P 0.48). Repeat discectomy had lower intraoperative blood loss, 88.75 mL (50–150) versus 111.47 mL (30-250) in PLIF ( P 0.289). PLIF had better ODI pain score 4.21(0-10) versus 9.27(0-20) ( P value of 0.018). Recurrence was 22.5% in repeat discectomy versus 0 in PLIF. Conclusion: PLIF and repeat discectomy for recurrent lumbar disc herniation have comparable intraoperative blood loss, duration of surgery and hospital stay. PLIF is associated with lower durotomy rates and better long-term pain control than discectomy. This is due to recurrence and progression of degenerative process in discectomy patients which are eliminated and slowed respectively by PLIF.