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Updated: Jul 9, 2026

Transtubular Endoscopic Posterolateral Decompression for L5-S1 Lumbar Lateral Disc Herniation
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Lumbar Microdiscectomy: A Rare Case of a Duplicate L5 Exiting Nerve Root

Sahil Garg1,2, Sean M Muir3, Arianna K Gill4

  • 1Orthopaedic Surgery, Steadman Philippon Research Institute, Vail, USA.

Cureus
|October 20, 2025
PubMed
Summary

Awareness of rare nerve root anomalies (NRAs) is crucial for microdiscectomy success. Preoperative identification and careful surgical planning can prevent complications during lumbar disc herniation treatment.

Keywords:
anomalous nervecase reportdual exiting nerve rootmicrodiscectomynerve root classificationssurgical complications

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Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...