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European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
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Normal spino-pelvic values for patients with lumbarization of S1 have not been described in the literature. Presented are the normal values for this population group, the prevalence of S1 lumbarization, and the correlation between pelvic incidence (PI) and lumbar lordosis (LL) in this group. ⋯ Incomplete imaging of the spine may lead to false estimation of the prevalence of lumbarization. Patients with lumbarization have higher lordosis values and lordosis can now be estimated during pre-operative planning for this group.