Fig. 3

Preoperative MRI lumbosacral spine of a 67-year-old female presented with right severe femoralgia and motor and visceral deficits for 5 months. a, b Preoperative T2-weighted MR images L1-L2 sizable herniated disc compromising the right root exit foramen. c, d Postoperative sagittal (c) and axial cuts (d) showing hemi-laminectomy with preservation of the corresponding facet joint and surgical bed with extirpated disc