Abstract
Percutaneous endoscopic lumbar discectomy (PELD) is a relatively less invasive treatment for lumbar disc herniation (LDH). The present study focused on the transforaminal approach (TFA) and investigated the significance of PELD via this approach for large central LDH. LDH that did not show cerebrospinal fluid (CSF) on axial T2-weighted magnetic resonance images was defined as large central LDH. PELD via the TFA was performed in 11 patients with large central LDH. Pre- and post-operative statuses were evaluated using the modified Japanese Orthopedic Association (mJOA) and Numerical Rating Scale (NRS) scores. The patients' mean age was 44.1 years; there was single-level involvement, mostly at L4/5 (seven cases). The mean recovery rate of the mJOA score was 48.7%, and mean pre- and post-operative NRS scores were 7.1 and 1.5, respectively. The mean operative time was 38.1 min. Although there were no major complications, the dura was accidentally punctured at the initial operative step for discography in one case. LDH recurred in one case at 5 months after the operation, and the patient was treated by PELD via the TFA on the contralateral side. The TFA for PELD is a safe, minimally invasive, effective treatment for large central LDH. However, the operator should pay attention to malpositioning of the flat and laterally expanded dural sac.
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