Abstract.
An 11-year-old girl presented with symptomatic grade IIB isthmic type spondylolisthesis, with an elongated pars, confirmed on magnetic resonance imaging (MRI). Posterolateral in situ fusion of L5/S1 was performed. At surgery, a significant bony defect in the posterior aspect of S1 was noted. Awareness of this possible co-existence is paramount if iatrogenic damage to neural elements is to be avoided during surgery.
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Kumar, R., Niall, D., Walsh, A. et al. Spina bifida occulta in isthmic spondylolisthesis: a surgical trap. Eur Spine J 11, 159–161 (2002). https://doi.org/10.1007/s00586-001-0358-6
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DOI: https://doi.org/10.1007/s00586-001-0358-6