Percutaneous Endoscopic Lumbar Discectomy for Lumbar Disc Herniation with Type II Modic Changes.

BACKGROUND: Percutaneous endoscopic lumbar discectomy (PELD) has become a favorable surgical approach for lumbar radiculopathy caused by intervertebral disc herniation. Studies have revealed patients with type II Modic change may suffer from unrelieved low back pain and higher LDH recurrence after herniated nucleus pulposus removal. Therefore, in this study, we aim to evaluate how PELD performed in management of LDH patients with type II Modic change.

METHODS: We collected 267 single-level LDH cases aged 20-50 years from December 2016 to December 2019 who underwent PELD. The mean follow-up time was 26.3 months (12-48 months). The Visual Analog Scale (VAS), Oswestry Disability Index (ODI) and MacNab scores, as well as the recurrence rate, were analyzed pre- and post-surgery, as well as at the time points of 3 months, 12 months and the final follow-up time after surgery. The clinical outcomes in LDH patients with or without type II Modic change who underwent PELD were thoroughly analyzed.

RESULTS: Within the 267 LDH patients enrolled, 145 cases present Modic signals, among which 3 are type I and 142 are type II. The VAS and ODI scores of the patients in the two groups at different follow-up times were significantly lower than those before surgery. The excellent and good MacNab scores in the control group and Modic type II change group were 87.0% and 82.1%, respectively. However, with the extension of follow-up time, the VAS and ODI scores, as well as the recurrence rate, were found to be higher in the type II Modic change group when compared with those in the non-Modic change group.

CONCLUSIONS: PELD performed well in management of LDH patients. However, we need to pay more attention to the continuous low back pain and the recurrence possibility in the cases with type II Modic change. In these cases, longer brace support or other interventions could be applied.