@article{JSS3742,
author = {Joel Louis Lim and Kimberly-Anne Tan and Hwee Weng Dennis Hey},
title = {Bone bridge formation across the neuroforamen 14 years after instrumented fusion for isthmic spondylolisthesis—a case report},
journal = {Journal of Spine Surgery},
volume = {3},
number = {1},
year = {2017},
keywords = {},
abstract = {This case report describes the first case of a bone bridge formation across the left L5/S1 neuroforamen after instrumented posterolateral fusion for L5/S1 isthmic spondylolisthesis. Our patient was a 70-year-old lady who had grade 2, L5/S1 isthmic spondylolisthesis and bilateral S1 nerve root compression. She suffered from mechanical low back pain and neurogenic claudication, with radicular pain over both S1 dermatomes. She underwent in-situ, instrumented, posterolateral fusion and was asymptomatic for more than 13 years before developing progressive onset of left radicular pain over the L5 dermatome. Imaging revealed a bisected left L5/S1 neuroforamen secondary to a bone bridge formation resulting in stenosis. The pars defect in this case may have had sufficient osteogenic and osteoinductive factors to heal following spinal stabilization. Although in-situ posterolateral fusion is an accepted surgical treatment for isthmic spondylolisthesis, surgeons should consider reduction of the spondylolisthesis and excision of the pars defects to avoid this possible long-term complication.},
issn = {2414-4630}, url = {https://jss.amegroups.org/article/view/3742}
}