Microscopic extra-laminar sequestrectomy (MELS) for the treatment of hidden zone lumbar disc herniation: report of the surgical technique patient selection and clinical outcomes

摘要

Schematic illustration of the extralaminar approach. a After crescent-shape excision of the lamina, the sequestered fragments can be explored with a hook along the exiting nerve root. b Postoperative three-dimensional reconstruction detailing the shape of excision (highlighted with the white arrow)