MIS removal of extraforaminal lumbar spine schwannoma using MAS–TLIF retractor: technical note

Background: To report the use of Nuvasive MAS–TLIF retractor for the removal of lumbar spine schwannomas. Methods: A 47-year-old man with 1-year history of back pain with progressive left sciatica underwent surgical resection of a left extraforaminal lumbar schwannoma (type IV according to Eden's classification) using the MAS–TLIF retractor. Results: The patient completely recovered from the preoperative symptoms and was discharged three days after surgery. The MRI acquired 6 months postoperatively showed complete tumour removal, with no signs of instability. The MAS–TLIF retractor allows for an optimal paraspinal tissues retraction, improving the area of exposure and the manoeuverability angle. Moreover, the stability of the retraction is guaranteed by the positioning of the two transpedicular screws. Spinal fusion is not necessary because the posterior tension band is not jeopardised. Conclusions: MAS–TLIF retractor allows for a minimally invasive and safe surgical removal of LSS maximising surgical exposure and avoiding spinal fusion.