Lumbar Foraminotomy Procedure, Lateral View

Description

Lumbar vertebrae are presented in lateral profile with the posterior elements opened to expose the intervertebral foramen, where the exiting nerve root courses inferior to the pedicle and anterior to the facet joint. The lamina and inferior articular process are partially removed, creating a widened foraminal window bordered superiorly by the pedicle, posteriorly by the facet complex, and anteriorly by the posterolateral vertebral body and intervertebral disc. Within this fixed lateral perspective, the nerve root is identifiable as it traverses the foramen toward the extraforaminal space, adjacent to the annulus fibrosus and the lateral recess region. Bone removal margins are emphasized. For lumbar radiculopathy caused by foraminal stenosis, osteophytes, hypertrophied superior articular process, or a far-lateral disc herniation, foraminotomy targets the point of entrapment without the exposure required for a full laminectomy. Surgeons and trainees often struggle with the three-dimensional relationship between pedicle, facet, and exiting nerve root, and a lateral view clarifies where excessive facet resection can trade decompression for postoperative segmental instability. The illustration also supports discussion of iatrogenic risks, including nerve root injury at the dorsal root ganglion, dural tear near the lateral recess, and inadequate decompression when the bony overhang of the superior articular process is left unaddressed. Use this illustration in spine surgery atlases, neurosurgery and orthopaedic residency lectures, and continuing medical education modules that compare laminotomy, medial facetectomy, and foraminal decompression at levels such as L4 to L5 or L5 to S1. It also fits patient-facing counseling materials on minimally invasive decompression for unilateral leg pain in foraminal stenosis, where a lateral surgical schematic outperforms abstract text. Anatomical accuracy verified by SciePro's Medical Advisory Board.